a group of the periodic table is called

Answers

Answer 1

Answer:

The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.

Explanation:

Answer 2

In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. ... Groups may also be identified using their topmost element, or have a specific name. For example, group 16 is also described as the "oxygen group" and as the "chalcogens".

(hope this helps ^^)


Related Questions

SOMEONE HELP ME PLEASE ILL GIVE BRAINLY

Snapping an instant cold pack is a

Change in temperature

Formation of gas/bubbles

Formation of precipitate

Release of energy (fire/light)

Change in color

Answers

Answer:

Answer

Change in temperature

It is an example of an endothermic reaction. It is absorbing heat.

Why can we not use the Nitrogen that we breath in

Answers

Answer:

Nitrogen is an inert gas — meaning it doesn't chemically react with other gases — and it isn't toxic. But breathing pure nitrogen is deadly. That's because the gas displaces oxygen in the lungs. Unconsciousness can occur within one or two breaths, according to the U.S. Chemical Safety and Hazard Investigation Board.

Answer:

because it is an insert gas and it is very dangerous for ear and our nose

Which best explains why aluminum is a nonrenewable resource?

A)It cannot be quickly replaced.
B)It is expensive to process.
C)It conducts electricity.
D)It is useful to humans.

Answers

Answer:

A.) It cannot be quickly replaced.

Explanation:

Aluminum is extremely useful to humans but is semi-difficult to produce. Because of this, your answer will be numero uno. (Or A.)

The electronegativity values of carbon, hydrogen, and nitrogen are compared in the table.
Comparison of
Electronegativity
Element Electronegativity
Carbon
2.5
Hydrogen 2.1
Nitrogen 3.0
Which of the following statements is true about the strength of the intermolecular forces in CH4 and NH3? (4 points)

Answers

Answer:

C. CH₄ is less than NH₃ because the NH bond is more polar than the CH bond

Explanation:

The intermolecular forces between ammonia is far stronger than for methane. Between the molecules of ammonia we have the presence of hydrogen bonds. This bond is absent in methane.

Hydrogen bonds are one of the strongest intermolecular forces. It is as a result of the electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom N, O and F of another molecule.

This strong interaction is absent in methane which has just dipole - dipole attraction.

The strength of the hydrogen bond depends on the electronegativity of the combining atoms.

need helpppppp hurry pls, i just really need help

Answers

Answer:

6.8 mole of O₂

Explanation:

Given expression:

       2H₂   +   O₂   →   2H₂O

Number of moles of H₂ = 13.6moles

Unknown:

Number of moles of O₂  = ?

Solution:

In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;

 From the reaction equation;

             2 mole of H₂ will completely react with 1 mole of O₂

         13.6 moles of H₂ will completely be used up by [tex]\frac{13.6}{2}[/tex] mole of  O₂

                                                                                        = 6.8 mole of O₂

Give two examples of compounds exhibiting double covalent bonds between atoms of its constituent molecules and explain why they form a double covalent bond.

Answers

Answer: Due to the sharing of electrons, they exhibit characteristic physical properties that ... Here, we discuss two classes of compounds based on the bond type that ... Covalent bonds are characterized by the sharing of electrons between two or ... Describe the types of orbital overlap that occur in single, double, and triple bonds

Explanation: That's what I think it is.


(ii) I cannot make the payment today.
(Use 'made' without changing the tense)

Answers

Answer:

I made the payment today.

Explanation:

What can you say about an atom with a -2 ion of oxygen-17? WILL GIVE BRAINLIEST

Answers

Answer:

The mass number of an isotope is indicated in the name of the isotope by writing the name of the element followed by a hyphen and the mass number.

Explanation:

Examples include carbon-14, uranium-235, and oxygen-17.

Please help :) —————————————

Answers

Answer:

I can't see what the picture says

What’s the answer????

Answers

Answer:

Greater

Greater

Explanation:

The amplitude of a wave is the height of the wave or the vertical displacement of the wave motion. We determine a wave amplitude usually by looking at the graph of the wave.

Amplitude is directly proportional to the energy of a wave. The higher the amplitude of a wave, the more its energy.

Frequency is the number of waves that passes a point at a particular instance of time. It is also directly proportional to the energy carried by a wave. The higher the frequency of a wave, the greater its energy.

how can you use these materials to test whether land or water heats faster?

Materials:
sand
water
heat lamps
thermometers
cups

Answers

Answer:

Put sand in one cup and water in the other. Put two heat lamps at equal height and under each one put the water and sand, this must be done at the same exact time. Set a timer for 5, then 10, then 15, and so forth minutes. Each time measure the temperature of each with the thermometers and write the down. Have a certain temperature you want them to get to and see which gets to it quicker. Then set a new temp 3 times to see if the answer is consistent.

Explanation:

Doing this would test whether land or water heats quicker.

Answer:

heat lamps

Explanation:

Describe what happens to particles of matter as you cool the matter to absolute zero (0K). In your description, be sure to explain the changes in kinetic energy and particles motion.

Answers

Explanation:

As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together.

Cooling involves the removal of heat energy from a body. Heat  increases the thermal energy of system. As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down.

Which screw would create a strong hold?

A: The screw with 9 wraps.
B: The screw with 2 wraps.
C: The screw with 10 wraps.
D: The screw with 6 wraps.

Answers

Answer:

The screw with 10 wraps is the correct answer

Explanation:

The screw with 6 wraps would create a strong hold.

What do you mean by screw?

The strongest member of the family of wood screws is a lag screw. It is a reliable and sturdy fastener that frequently has a square head or an externally powered hex drive.

In general, lag screws are significantly stronger and heavier than standard wood screws. They have a tapered point and coarse threads.

Thus, The screw with 6 wraps would create a strong hold.

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

https://brainly.com/question/24168324

# SPJ5

A car is traveling at 50mph. How long will it take the car to travel 300 miles?

Answers

Answer:

6 hours

Explanation:

If it is traveling at 50mph and needs to reah 300 miles, to figure this problem out you would want to divide 300 by 50 to get 6 hours. So it will take six hours until the car travels 300 miles

Hope this helps.

Answer: A car travels at a rate of 50 miles per hour. how long will it take the car to travel 300 miles?

Explanation: .

Applying the distance formula:

d = rt

where

d is distance (300 miles)

r is rate (50 mph)

t is time (hours)

.

300 = 30t

300/30 = t

10 hours = t

what is hydrophobic

Answers

Answer:

water fearing particle can be termed as HYDROPHOBIC

Answer:

Hydrophobic means "scared of water" or "the fear of water."

Hydro = water

phobic = fear

You'll use this at one point in Biology class.

The rate of a chemical reaction would be decreased by

Answers

Answer:

The tempreature???

Explanation:

Colder tempreatures lead to a slower chemical reaction and warmer tempreatures lead to a faster  chemical reaction.

If, in the reaction below, 49 grams of Fe3O4 produces a 78.25% yield of Fe. How many grams are produced?

Really need help on this please, I’ll give brainliest!!

Answers

Only 10 jdjsjkslqms xmcmdlslsllxndmwlzodod
Only 10 grams are produced!

2. How can glass be a liquid if it's so hard?

Answers

Explanation:

Glass is not a liquid in the strictest sense of the word. But it is also not a standard solid. The chemistry of glass is complex and research is ongoing, but the current consensus is that glass is a phase of matter all its own, known as an "amorphous solid". Scientists refer to any amorphous solid as a "glass". Glass transitions are highly complex and cannot be treated in the same way as traditional phase transitions.

Answer:

It's a liquid state before its cooled.

Use your answers from questions 1–3 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this experiment and how it was completed. Outline the steps of the procedure in full sentences. It also provides potential answers (your hypothesis/es) relative to what you expected the experiment to demonstrate. This section should be 1–3 paragraphs in length.

Answers

Answer:

1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…."                        2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.

Explanation:

Answer: the correct answer is A

Explanation:

You can choose from four different materials to make the handrails that run up the stairs and around the playhouse: steel, aluminum, solid plastic, or pine wood.

2. Would you want to minimize or maximize the heat transfer to and from the handrails? Explain your reasoning.

Answers

I think it would be minimize so u can have more friction

Answer: The best material to make the handrails of the playhouse is Aluminum. This is because aluminum is an extremely versatile metal with a number of advantages, it is recognized for being both lightweight and flexible.

Explanation:

HOPE THIS HELPS!

ALSO THE OTHER ANSWER IS WRONG.

JUST SAYING >33

what is the element for I am a metal and I have 6 Neutrons. PLEASE ANSWER TO MY QUESTION QUICKLY!!!!

Answers

Answer:

carbon-12

Explanation:

carbon 6/12 isotope has 6 neutrones and it is considered as a metal.

explain what is earthquakes and volcanoes

Answers

Explanation:

There is no ostensible relation between earthquakes and volcanoes though there are zones on earth where both natural...

• Volcanoes result from openings in the surface of the earth that brings along hot magma (molten rocks) with its wake

Answer:

Earthquakes are when the earth starts to movers and usually cracks open.

Volcanoes are big like of like spouts that go from under the ground to as tall as a small mountain. When erupted the will spit out lava and magma from the top.

Explanation:

Hope this Helps!

:)


What is the total number of grams of a 32-gram sample of 32P remaining after 71.5 days of decay?

Answers

Answer:

1 g

Explanation:

The following data were obtained from the question:

Original amount (N₀) = 32 g

Time (t) = 71.5 days

Half-life of phosphorus (t½) = 14.3 days

Amount remaining (N) =?

Next, we shall determine the rate of disintegration. This can be obtained as follow:

Half-life of phosphorus (t½) = 14.3 days

Decay constant (K) =?

K = 0.693 / t½

K = 0.693 / 14.3

K = 0.0485 /day

Finally, we shall determine the amount remaining as illustrated below:

Original amount (N₀) = 32 g

Time (t) = 71.5 days

Decay constant (K) = 0.0485 /day

Amount remaining (N) =?

Log (N₀/N) = Kt/2.303

Log (32/N) = 0.0485 × 71.5 / 2.303

Log (32/N) = 3.46775 / 2.303

Log (32/N) = 1.5058

Take the antilog of 1.5058

32/N = antilog (1.5058)

32/N = 32.05

Cross multiply

32 = N × 32.05

Divide both side by 32.05

N = 32 / 32.05

N = 0.998 ≈ 1 g

Thus, the amount remaining after 71.5 days is approximately 1 g.

The half-life of a radioactive substance refers to the time taken for the substance to Decay to half of its initial size. Hence, the mass of the substance left after 71.5 days is 1 gram.

Initial mass = 32 g Half life = 14.3 days

After 14.3 days ;

32 / 2 = 16 grams

After 14.3 × 2 = 28.6 days :

16/2 = 8 grams

After 14.3 × 3 days = 42.9 days :

8 / 2 = 4 grams

After 14.3 × 4 days = 57.2 days :

4 /2 = 2 grams

After 14.3 × 5 days = 71.5 days :

2 /2 = 1 gram.

Hence, the mass of the sample left after 71.5 days would be 1 gram.

Learn more : https://brainly.com/question/18766174

Someone tell me if I did the equation correctly or not.
Reaction between aqueous Washing soda and lemon juice=
3Na2Co3 + 2C6H8O7 = 2Na3(C6H3O7)+3CO2 (g) + 3H2O(l)


Answers

Hey There!_____________________________________Answer:

Washing Soda:

Sodium Carbonate commonly known as Sodium Carbonate is a inorganic compound which used in detergents and to soften the water. Its chemical formula is [tex]Na_{2}CO_{3_[/tex]. It is carbonate base

Lemon Juice:

Lemon juice contain citric acid whose chemical formula is [tex]C_{6} H_{8} O_{7}[/tex]. Citric acid is a weak organic acid thus It is used for disinfectants and cleaning as well.

_____________________________________Reaction b/w Washing Soda and Citric Acid

When Lemon Juice and Washing Soda react, the reaction is just an acid-base reaction and forms trisodium citrate and carbonic acid. The latter is then dissociated into Carbon Dioxide and Water. Carbon Dioxide escapes in the form of bubbles and Sodium Citrate(salt) and Water behind.

(citric acid)+ (sodium carbonate)= (trisodium citrate)+(water)+(carbon dioxide)

                                 OR

            [tex]2C_{6}H_{8}O_{7} + 3Na_{2}CO_{3} ---> 2Na_{3}(C_{6} H_{3} O_{7})_{2} + 3H_{2}O + 3 CO_{2}[/tex]

_____________________________________Best Regards,'Borz'

Write a BALANCED chemical equation for the acid base reaction between aqueous perchloric acid and aqueous calcium hydroxide.​

Answers

Answer:

2HClO4 + Ca(OH)2 = Ca(ClO4)2 + 2H2O

Explanation:

Formula for aqueous perchloric acid is; HClO_4 (aq)

Formula for aqueous calcium hydroxide is; Ca(OH)_2 (aq)

Thus chemical equation is;

HClO4 + Ca(OH)2 = Ca(ClO4)2 + H2O

We have to balance it and so we now have;

2HClO4 + Ca(OH)2 = Ca(ClO4)2 + 2H2O

Which of the following is a scientific question?
O A. Who made the first plant-hardiness zone map?
O B. Which plants are sold by my local nursery?
O c. Which kind of flowers should I plant in my garden?
O D. How does gravity affect the growth of plant roots?

Answers

The answer would be D.

Hope this helps!! (:

To soften cloths in the wash it is recommended to use 2.0 g of sodium borate per liter of water. If a filled washing machine holds 10 L of water and the correct amount of sodium borate per liter is added, what is the concentration in percent mass/volume of the solution?

Answers

% m/v of the solution = 0.2%m/v

Further explanation

[tex]\tt Percent~m/v=\dfrac{mass~solute(g)}{volume~solution(ml)}\times 100\%[/tex]

or

% m/v = g solute / 100 ml solution

Concentration : 2 g sodium borate / L water

For 10 L⇒20 g Sodium borate

[tex]\tt \%m/v=\dfrac{20~g}{10,000~ml}\times 100\%\\\\\%m/v=0.2\%[/tex]

We can change the substance chemically by
freezing it.
True or false​

Answers

The answer for the forgiving question above hypothetically speaking they a screen with imagination is going to be true
It’s mostly going to be true

What product(s) are formed during this chemical reaction? (There will be two correct answers)

Ca + Na3PO3 rightwards arrow


CaNaPO3


Ca3(PO4)2


Ca2(PO4)3


Ca(PO3)2


Na


Na3


CaNa


No Reaction

Answers

Answer:

Ca3(PO4)2 and Na

Explanation:

The reaction equation is;

3Ca + 2Na3PO3 -------> Ca3(PO3)2 + 6Na

We must remember that calcium is above sodium in the electrochemical series. This implies that calcium can displace sodium from its solution. Calcium has a reduction potential of -2.87 V while sodium has a reduction potential of -2.71 V. The ion with the more negative reduction potential can easily displace the other in aqueous solution.

This explains why the reaction above is possible.

As the frequency decreases the wavelength...

Answers

Answer:

Increase

Explanation:

Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths.

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