Refer to your periodic table:

Which of the following has the smallest atomic radius?






Answer 1



bromine has 185pm, astatine haa 200, iondine has 140 and lastly fluorine has 147. so iondine has the smallest atomic radius

Related Questions

What is Arsenic cost per unit?



arsenic costs $320 per 100g


Michelle learns in science class that simple machines such as an inclined plane can change the amount of force needed to lift heavy objects. She decides to test this with an experiment.

Michelle chooses a 10 kg weight. She sets up a ramp made of smooth metal that makes an angle θ with the floor. She attaches a spring scale to the weight and the top of the ramp in order to hold the weight in place. She records the force from the spring scale, then changes θ and records it again. She repeats this several times.

In this experiment, what is the dependent variable?


the mass of the weight


the angle θ between the ramp and the ground


the amount of force on the spring scale


the material the ramp is made of
Be fast please


I think it may be c I’m sorry if it’s wrong

Would love some help pleaseee. and please at least read the question instead of skipping it please.

Measuring tools can have errors. Errors lead to ___________________ results and _______________ conclusions. To calculate the difference of the accepted value and the experimental value, scientists use this formula:
percent error = (experimental value − ) × 100. accepted value
Minimizing Bias
People show bias when they want everyone to accept their results. Bias can arise for many reasons:
• Companies show bias when they depict only the research details that are in the best interest of their ____________.
• Scientists may be biased toward their _____________ and modify results suit their needs.
• Scientists may also show to bias get their research published in ______________ ______________.
Such biases often lead to _______________ facts. An important part of scientific thinking is identifying biases and taking the necessary steps to minimize them.
For results to be considered scientifically accurate, any scientist, regardless of his or her own bias, should be able to replicate the experiment and get the same results.
Think of some studies you’ve heard about. How can you tell whether the studies were well-designed and scientifically accurate or had biases?


Answer: this looks like your homework

Explanation:if you want help you are going to have to ask a specific question instead of giving people your homework.


Honestly I would search this up maybe there might be a pdf with the answers. Sorry chemistry isn't my thing:(


What is force and motion


force is a strength or energy as an attribute or physical action or movement, motion is the action or process of moving or being moved


In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes beginning moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.

= google


stages of mitosis in order



nucleus formed




telophase and cytokinesis

Which of the following is the correct model of C7H16?





Option D gives the correct model of C7H16. From the option, one will discover that the model has 7 carbons in the backbone. If you count the attached hydrogen, you will discover that the hydrogen is 16 in total.

This model or skeletal structure of this element represents heptane. Heptane or n-heptane is known to be a straight-chain compound and an alkane. It's chemical formula can also be written as: H₃C(CH₂)₅CH₃ or C₇H₁₆.

This compound is known to be one of the main components of gasoline. It is known to be a volatile organic compound and a clear and colorless liquids with a petroleum-like odor.

Answer: D

Explanation: Just took the test

25 cm of liquid 'A' and 20 cm of liquid
'B' are mixed at 25°C and the volume of
solution was measured to be 44.8 cm3
then correct reaction is
(A) A Hmix = 0, solution shows



The correct option is;

(B) [tex]\Delta H_{mix} < 0[/tex], solution shows negative deviation


The given parameters are;

The available volume of liquid A = 25 cm³

The available volume of liquid B = 20 cm³

The volume of the solution (mixture) = 44.8 cm³

Therefore, we have;

[tex]\Delta _{mix} V < 0[/tex]

Which is one of the prerequisite for the formation of negative deviation

When a non-ideal solution shows negative deviation according to Raoult's Law, we have;

[tex]\Delta _{mix} H < 0[/tex], we have more heat released due to new molecular interactions.

What is the mass of an object with a density of 5.7 g/cm^3 and a volume of 48
cm^3? *



273.6 g


mass =(density)(volume)

mass=(5.7g/cm^3 )(48 cm^3)

cancel out your cm^3 and your are left with grams

multiply (5.7g)(48)=273.6 g

The mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

What is density?

Density is defined as the degree to which a material is packed together.

It is also defined as a mass per unit volume of the substance.

Its SI unit is kilogram per cubic meter or  gram per meter.

Density can be expressed as

Density = mass / volume

Mass =  density x volume

As given, Density = 5.7 g/cm³

                Volume = 48 cm³

So, Mass =  5.7 g/cm³ x  48 cm³

               =  273.6 grams

Thus, the mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

To learn more about density, refer to the link below:


When many earthquakes are studied, there is another common pattern that emerges: a "Shadow Zone". This is an area, for any earthquake, on the Earth where direct S-waves don't arrive at all and P waves are refracted. What do you think causes these P waves to be refracted? *



Sudden decrease in the velocity at the boundary.


The shadow zone is the zone of the earth from angular distances of 104° to 140° from a known earthquake that does not directly receive any P waves. Now, this shadow zone occurs as a result of S waves getting stopped completely by the liquid core and the P waves being refracted by the liquid core.

From earlier seismic discoveries, this boundary which is the shadow zone that does not directly receive any P-waves was found to be due to the fact that the P-waves were refracted inwards as a result of the sudden decrease in velocity at the boundary.

Which types of matter are made of atoms

a. Mixtures
b. Elements
C. Compounds
D. All of the above



D all above yes I think it's all above

Answer:  D

Explanation: All of the above.

Plz mark brainliest:)

How does the valence electron configuration (entire last energy level configuration) relate to the group number on the Periodic Table? Use the shorthand notation in your discussion.



The valence electron configuration determines the group to which an element belongs to.


The valence electron configuration of an atom of an element refers to the number of electrons in that atoms outermost shell.

The valence electron configuration is related to the group number of an element in that the number of electrons in the valence shell of an atom of an element determines the group to which an element belongs to. For example, all elements having one valence electron belong to group IA of the periodic table. Similarly, all elements having seven valence electrons belong to group VIIA of the periodic table.

This is because, since the reactivity of an element is related to its ability to either gain or lose a certain number of electrons in its valence shell, elements having same number of valence electrons have similar chemical properties.

Volcanic belts form along
islands in the Pacific Ocean.
North American mountain ranges.
the boundaries of Earth’s plates.
the coast of Antarctica.

Please select the best answer from the choices provided


C. The boundaries of earths tectonic plates

You are conducting an experiment with two very reactive substances. One will react with oxygen (O) and other substances in the air, and the other will react to metal in a container. What type of environment can you seal them in so they only react with each other?



seal them in a glass container in an atmosphere of argon (Ar) gas


Why are biopharmaceuticals in high demand?



the market is largely driven by the growing population, increasing burden of chronic disease, and rising inclination toward targeted therapy.


also, the huge demand of biopharmaceutical is facilitated by an accelerating focus in research and related investment.


What determines how many of each ion is required for an ionic compounds?

please do not look up on google!!!!


Each ion has a single charge, one positive and one negative, so we need only one ion of each to balance the overall charge. When writing the ionic formula, we follow two additional conventions: (1) write the formula for the cation first and the formula for the anion next, but (2) do not write the charges on the ions.

How many moles are in a sample of 2.39 x 10^23 atoms of sodium (Na)



The answer is 0.4 moles


To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.39 \times {10}^{23} }{6.02 \times {10}^{23} } \\ = 0.39700996...[/tex]

We have the final answer as

0.4 moles

Hope this helps you

choose the letter that best describes the behavior of a substance during a phase change:

/A/ neither absorbs or releases energy

/B/ always absorbs energy

/C/ always releases energy

/D/ either absorbs or releases energy



/D/ either absorbs or releases energy


During a phase change energy is either absorbed or released.

A phase change is a reversible process which occurs when a substance changes is its state from one form to another.

Phase changes are used to delineate physical changes.

A phase diagram provides a graphic representation of the change. The diagram can be 2 dimensional or 3 dimensional.

If the density of a substance is 2.18 g/mL, how would you find the density given that the mass is 0.987 kg and the volume is 4.52 x 102 mL?




Convert mass in gms .. 987 gms

Density = mass/ volume

= 987/4.52 x102

= 2.18 g/mL

What is the decomposition of 2LiCIO3


Decomposition is AB —> A + B

2LiClO3 —> 2LiCl + 3O2

Which describes the elements in a given group of the periodic table?

They decrease in atomic mass as you go down the column.
They increase sequentially in atomic number from top to bottom.
They are in the same family, with similar characteristics.
Their properties change according to a pattern as you go down the column.



They are in the same family, with similar characteristics.


The elements in a given group of the periodic table are in the same family and with similar characteristics.

Vertical columns on the periodic table are referred to as a group or family. Elements having the same number of electrons in the outermost shell of their atoms are placed one another in vertical columns. Each resulting vertical column is a group or family. Elements in the same group exhibit similar chemical properties because of the same number of electrons in their atoms' valence shells.

32 N of Force. 37 N force. How strong is the net force and in which direction?


5 units to the left.

They are working against each other. That means you subtract.

32 - 37 = -5

You are moving 5 units to the left because 37 is negative which means it is moving left. The key word is left. In physics, you would get the same answer if you did it this way.

37 - 32 = 5

The 5 moves in the same direction as the 37

Pioneer species like Lichens and Mosses inhabit an area after a major disturbance, such as a volcanic eruption. Over time, other species are found in the disturbed areas, and the number of pioneer species decreases. Why does the number of pioneer species get less?



The number of pioneer species get less as the area has more soil to support complex plants and the competition decreases the role of pioneer species.


Pioneer species like Lichens and Mosses inhabit an area after a major disturbance, such as a volcanic eruption. However, with time the number of pioneer species decreases.

The number of pioneer species get less as the area has more soil to support complex plants and the competition decreases the role of pioneer species.

Does the use of lithium cause human health problems?





Lithium can cause nausea, diarrhea, dizziness, change in heart rhythm, muscle weakness, fatigue, and a dazed feeling

Continued use of Lithium could mean fine tremor, frequent urination, and thirst


challenges we will face terraforming Mars


Because Mars has no atmosphere, astronauts will be exposed to high levels of cosmic radiation which could cause cancer or death. The lack of atmosphere also produces severe weather - very high and low temperature as well as very high wind speeds. Astronauts will likely have to live nearby caves or underground until an atmosphere can be formed due to these elements.

Need help ASAP please


Answer:Melting can create steam, kind of like a nukeular plant exept no nukulear rods

1. Endothermic; increases
2. Exothermic; decreases
3. Endothermic;increases
4. Exothermic; decreases
5. Endothermic; increases

What suprising result is explained using this model



B. A few positive particles bounced back because they were pushed away from the positive center.


The result of the experiment conducted by Rutherford shows that a few positive particles bounced back because they were pushed away from the positive center.

This is the central theme of Rutherford's experiment on a thin gold foil.

In 1911, Rutherford performed the gold foil experiment that gave the modeling of the atomic structure a great boost. He bombarded a thin gold foil with alpha particles. He discovered that most of the alpha particles passed through the foil while a few of them were deflected back. This led him to postulate that an atom has a small positively charged center where nearly all the mass is concentrated.

How many atoms are in the following formula?



15 atoms total


2 Al atoms + 3 O atoms = 5 Al2O3 atoms

5 Al2O3 atoms * 3 = 15

another way to do it is:

2 Al atoms * 3 = 6 Al atoms

3 O atoms * 3 = 9 O atoms

6+9 =15 atoms total

The number of atoms in the given 3Al₂O₃ is 15 atoms.

What are atoms?

Atoms are the smallest unit of every matter. It contains charged particles present inside the atoms. They are electrons, protons, and neutrons. Atoms are of four types, description, isotopes, radioactive, and ions.

These atoms are the ions, that are charged, and the charged ions make bonds with each other to form compounds. Aluminum oxide is a compound that is formed by combining aluminum and oxygen atoms.

The compound is 3Al₂O₃

This means there are three moles of aluminum, and three moles of oxygen.

2 Al atoms + 3 O atoms = 5 Al₂O₃ atoms

5 Al₂O₃ atoms x 3 = 15

The elaborative way is:

2 Al atoms x 3 = 6 Al atoms

3 O atoms x 3 = 9 O atoms

6 + 9 =15 atoms total

Thus, the number of atoms is 15 atoms.

To learn more about atoms, refer to the link:


A train in Japan can travel 813.5 miles in 5 hours





Given parameters:

Distance covered by the train  = 813.5miles

Time taken  = 5hours


Speed of the train  = ?


Speed is a physical quantity.

It is mathematically expressed as;

      Speed  = [tex]\frac{distance}{time}[/tex]

So, input parameters and solve;

   Speed  = [tex]\frac{813.5}{5}[/tex]  = 162.7miles/hr

what is the name of CCI3
carbon trichlorine????


Carbon tetrachloride, also known by many other names (such as tetrachloromethane, also recognised by the IUPAC, carbon tet in the cleaning industry, Halon-104 in firefighting, and Refrigerant-10 in HVACR) is an organic compound with the chemical formula CCl4.

Not all protists use flagella or cilia to move. Give an example of another way protists move and identify the type of protist that uses that mode of movement.​


Answer: One of the most striking features of many protist species is the presence of some type of locomotory organelle, easily visible under a light microscope. A few forms can move by gliding or floating, although the vast majority move by means of “whips” or small “hairs” known as flagella or cilia, respectively. (Those organelles give their names to informal groups—flagellates and ciliates—of protists.) A lesser number of protists employ pseudopodia. Those same organelles may be used in feeding as well.


Other Questions
what does this quote mean Fashion should be a form of escapism, and not a form of imprisonment What is the slope of line that passes through the points -2,4 and 1,-1 What would be the answer to this honest answers only its important Can somebody please help? What is one-way Japan's closest neighbor Korea has affected Japan's development Please help! I'm in a hurry Which of the following was the home to early American Indians living in Georgia at the time of European contact?Amounds near BartowBFlint River BasinFlorida mainlandOkefenokee Swamp Add -7d - 3 and 10d - 6. Show all steps. |-9+7|+8 is less than or equal to 9 List at least threeadjectives that describethe Aztec capital ofTenochtitlan.More is OK The correct Standard Form of the equation y=2/7x11/7 A teacher uses the function G(x) = -3x + 100 to calculate a student's grade, G(x), on a test if the student misses x questions on the test. Which statement best descebes the slope of the function? Show complete working format please Which of the following is a reason for the genetic variability from sexual reproduction? A. The more variety there is in the gene pool, the less arrangements in the population.B.The genes that are dealt to the offspring from their parents are by systematic event.C. Offspring have the same gene combinations of either of their parents.D. Members of a species choose mates, creating different combinations of genes.Please help. This is due today. HURRY PLEASE HELPWhat is the approximate distance from the origin to the point (10, 4, 5)? Round to the nearest tenth. 4.4 units 10.4 units 11.9 units 19.0 units On Monday, you run treadmill for 1/2 hour at x miles per hour. On Tuesday, you walk the same distance on the treadmill, at 2 mph slower, and it takes you 3/4 hour.How many miles did you run on the treadmill on Monday? Question 4 of 18 This is an excerpt from the website World War I by high school student Alexia Dengbai World War I may not have ended all wars that would come later, but at the time, it was one of the deadliest conflicts in history. An estimated 15 million soldiers and civilians were killed in the war. New warfare technologies, like armored tanks and airplanes, added to the death and destruction of the war Which statement about the credibility of this source is most accurate? A This source is not credible because it contains more opinions than facts B. This source is credible because it contains opinions that are shared by other authors. C. This source is credible because it contains facts and information that are accurate D. This source is not credible because it was not written by an expert in the field PREVIOUS Need some help before 8:00 EST Plz do fast I need it for a test The front view of a tent is.shown below if a going to be put in along the length x how long should the.zipper be What part of the (form) song has the title in it If a person walks 1/3 of a mile every 1/6 of an hour, what is their speed in miles per hour?