Which of the following elements is a metalloid? A. phosphorus B. cobalt C. silicon D. magnesium

Answers

Answer 1

Answer: silicon

Explanation:it just is

Answer 2

Respuesta

es la C. silicio

Explanation:

No existe una definición estandarizada de elemento metaloide ni un consenso completo sobre los elementos que son metaloides.

En la clasificación de metaloides se suelen incluir a:

Boro (B)

Silicio (Si)

Germanio (Ge)

Arsénico (As)

Antimonio (Sb)

Telurio (Te)


Related Questions

The half-life of carbon-14 is about ____________ years.

Fill in the blank.

Answers

The half-life of carbon-14 is about 5730 years

Answer:

5730 years

Explanation: for more on radiocarbon dating.) and hence explain why the amount of carbon-14 in the sample decays by half over any period of 5730 years.

Which type of bond is salt? a. covalent b. valence c. metallic d. ionic

Answers

Answer:

D. Ionic

Explanation:

It has ionic bonding! Good luck ^^

need help asap!!!!
will mark brainliest!!!

Answers

We can verify the properties as follows;

1) Sour taste - Put some soda on your tongue

2) Corrode metals - Put a little soda on a clean metal surface

3) Effect on Litmus paper - Dip a blue litmus paper in soda

4) Electrolysis - Add two electrodes to soda and connect a battery.

Does Soda show acidic properties?

Soda, specifically carbonated beverages like cola or soda pop, typically exhibits acidic properties. The acidity of soda is primarily due to the presence of carbonic acid (H₂CO₃), which forms when carbon dioxide gas (CO₂) dissolves in water.

When carbon dioxide is dissolved in water under high pressure, it forms carbonic acid through the following reaction:

CO₂ + H₂O ⇌ H₂CO₃

Learn more about Soda:https://brainly.com/question/31889777

#SPJ1

Select the correct answer

Giving brainliest

Answers

Answer:

I'm gonna say A and B

Explanation:

Not sure though

Hope I helped :)

Describe how sodium (Na) and chlorine (Cl) interact to form an ionic compound. Specifically, what is happening to an electron?

Answers

When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable. The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.
Here you go its agin me answering you

Would you expect manganese(II) oxide, MnO, to react more readily with HF(aq) or NaOH(aq)?

Answers

Answer:

NaOH(aq)

Explanation:

NaOH(aq) is known to precipitate Mn^2+ ions according to the following reaction; Mn^2+(aq)+2OH^−(aq)↽−−⇀Mn(OH)2(s)

Hence, manganese(II) oxide reacts more readily with NaOH(aq) under ordinary conditions precipitating the metal hydroxide solid. This is one of the characteristic reactions of Mn^2+.

What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and neutrons

Answers

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Answer: I'm pretty sure the answer is Number of Protons

Explanation:

I took the k-12 test

You can see protons yes or no

Answers

No. Not with the naked eye

plsssssssssssssssssssssssssssssssssssssssss help me

Answers

Answer:

C

Explanation:

A year is a complete revolution around the Earth

Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol?

Answers

Hey you got a picture you can call the number one phone call you got it and send

help pls I will give brainliest!

Answers

Answer:

The answer is D, I would type it out but it is to long and I'm kind of lazy, but anyways! Your answer is D

Hope This Helps!

Look at the chemical equation below.
2N2 + O2 2N2O
How many Nitrogen molecules are present? ___________
How many Oxygen molecules are present? ___________
How many N2O molecules are present? ___________

Answers

8 Nitrogen, 4 oxygen, 2 N2O

The molecules of Nitrogen, oxygen, and N₂O are  2, 1, and 2 respectively.

What is the chemical equation?

A chemical equation can be defined as the expression of a chemical reaction in terms of the chemical symbols of the substances. A chemical equation has reactants, formed products, and an arrow indicating the direction of the reaction.

The equation in which the number of atoms of each element is equal on either side of the chemical equation of a reaction is called a balanced chemical equation.

According to the law of mass conservation, the total mass of the elements on the reactant side should be equal to the total mass of elements on the product side.

Given, the chemical equation of the reaction of nitrogen ad oxygen gas can be written as:

2N₂  +  O₂ → 2N₂O

The number of molecules of Nitrogen gas is 2 and the molecules of oxygen gas are one and the molecules of N₂O are equal to 2.

Learn more about the chemical equation, here:

brainly.com/question/28294176

#SPJ3

1. Which best represents a compound?

Answers

Answer:

D

Explanation:

The one that best represents a compound is answer "D" because you compounds are chemically bonded and are always together.

Which of the following is a subsurface event that takes place during the rock cycle?

Group of answer choices

Cementing

Erosion

Melting

Weathering

Answers

Answer:

Melting

Explanation:

Could not have been erosion because erosion happens on the surface.

Could not have been weathering because weathering happens on the surface.

So we only have Cementing and Melting left....

The answer is melting, I got 100% on my test.

Hope this helps!!!! :D

Please give brainliest!!!

Answer:

D

Explanation:

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Isopropyl alcohol is a liquid with a density of 0.785 g/cm^3. How much volume would be taken up be 50.0 grams of isopropyl alcohol

Answers

Answer:

63.94 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

From the question we have

[tex]volume = \frac{50}{0.785} \\ = 63.694267...[/tex]

We have the final answer as

63.94 cm³

Hope this helps you

Etiquetas de productos de casa formula química, nombre de la formula, y el nombre del producto. Ejemplo NaCL, Cloruro de sodio, sal.

Answers

Answer:

Azucar, bicarbonato de sodio, lavandina, vinagre, amoniaco.

Explanation:

Podemos numerar estos compuestos

Azucar → Sacarosa → C₁₂H₂₂O₁₁

Lavandina → Hipoclorito de sodio → NaClO

Vinagre → Ácido acético → CH₃COOH

Bicarbonato de sodio → NaHCO₃

Amoníaco → NH₃

I WILL GIVE BRAINLIEST TO YOU IF YOU ANSWER THIS (I KNOW THE ANSWER, SO IF YOU SOLVED WRONG, I WONT GIVE BRAINLIEST) SO YOU BETTER GIVE CORRECT ANSWER OR IM NOT GOING TO GIVE BRAINLIEST

Answers

Answer:

Corona Virus outbreak

What part of the earth are the plate tectonics on?
lithosphere

outer core

asthenosphere

inner core

Answers

Outer core, thank me later
It should be outer core, if not lithosphere

Clinical thermomerter​

Answers

Answer:

Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.

a small medical thermometer with a short but finely calibrated range, for taking a person's temperature.

This is a science question.

What is the acceleration of this helicopter?

Answers

Answer:

7m/s

Explanation:

Is the acceleration of the helicopter

A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?

A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.​

Answers

Your answer is B Particle motion is coming to a complete stop.That's your answer!

Hope this helps!!!

Answer:

B

Explanation:

i have the same test

After pollen lands on the stigma of a flower, which of the following happens first?






Help I will give brainlist

Answers

The correct answer is:

Pollination

What effect does the spinning of the earth's core have?
A.it creates gravity
B. it creates matter
C. it creates mass
D. it creates the earths magnetic field.

Answers

Answer:

c

Explanation:

its c

Earth contains a spinning electric filed. The spinning of earth core creates its magnetic field. Thus, option D is correct.

What is a spinning body?

A body which rotates in its own axis is called a spinning body. Earth rotates about its along with revolving around sun.  The outer core of earth generates electric current. This is called telluric current.

Flow of this current creates an electric current which is parallels to the surface of earth. The direction of magnetic field lines will be perpendicular to the direction of current. But it comes stronger when parallel to current.

A rotating electric current results in the generation of a magnetic field. Thus spinning of  earth core generates a magnetic field and therefore, option D is correct.

To learn more about magnetic field, refer the link below:

https://brainly.com/question/11514007

#SPJ2

Explain why the Earth has four different seasons​

Answers

Answer:

Earths rotation

Explanation:

Answer:

because if there was not four diferent season we would not have a day or a night because we would not be moving

Explanation:

which statement is a scientific law

Answers

Answer:

It is b

Explanation:

please help this is worth half of my grade! what letter represents the trough of the wave a,b,c,d,e

Answers

Hello good afternoon...God bless the answer to your following question is D

because...A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.

Which of these describes a challenge that the engineer of a high-altitude
airplane would need to consider?
A. More fuel is used at higher altitudes.
B. The airplane may succumb to the power of gravity as lift
decreases at higher altitudes.
C. The airplane may need a heat shield for protection from sonic
booms.
O D. The airplane will create more drag at higher altitudes than lower
altitudes.

Answers

Answer:

I think its (B)

Explanation:

as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.

The answer is option B.

Which of the following are electromagnetic waves? *

Water waves

Sound waves

Radio waves

Seismic waves

Answers

electromagnetic waves are radio waves.

A block of lead displaces 50.5ml of water. The block weighs 698 g. From this
information, calculate the density of lead.

Answers

Answer:

13.82 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{698}{50.5} \\ = 13.8217...[/tex]

We have the final answer as

13.82 g/mL

Hope this helps you

Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases

Answers

Answer:

a. Reactants: F₂ and HCl molecules

Products: Cl₂ and HF

b. 4HCl + 2F₂ ----> 4HF + 2Cl₂

c. Single replacement reaction

Note: The question is not complete. The complete question is found below as well as in the attachment.

Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases:

a. write a formula for each of the reactants

b. write a balanced equation for the reaction

c. indicate the type of reaction as combination,decomposition, single replacement, double replacement, or combustion

Explanation:

a. From the models shown in the diagram, The reactants are F₂, HCl while the products are Cl₂ and HF respectively

b. Equation for the reaction is given below;

4HCl + 2F₂ ----> 4HF + 2Cl₂

c. The reaction is single replacement reaction such that fluorine gas molecules replace the chlorine atoms in hydrogen chloride to form hydrogen fluoride with the liberation of chlorine atoms as gaseous molecules.

Other Questions
I need the anwser soon!!Which two statements describe what happens to energy during cellularrespiration?O A Chemical energy is transferred to molecules of ATP and used tocarry out fe processes.B. Some thermal energy is transformed into chemical energy-C. Some chemical energy is transformed into thermal energyD. Light energy is transferred to molecules of ATP and used to carryout te processes I dont understand help me plz hard fkkfjfcjcjjc ekkfjfjfhgfjfnfhfhfhrj A historian finds a scroll that belongs to an ancient Chinese civilization. The scroll describes how good and kind a ruler was. The historian immediately starts writing a biography of the ruler based on the scroll.What is likely true about the article that the historian is writing?A. The article will be credible because the historian is highly qualified and quite famous.B. The article will be interesting because it presents new information about ancient China.C. The article will be biased because the historian is using only one source about the ruler.D. the article will soon be published in a leading historical journal because it contains new facts. What is the difference between glucose and ATP?Glucose is a storable form of energy, while ATP is a usable form of energy. ATP is a storable form of energy, while glucose is a usable form of energy.ATP is only a usable form of energy, but glucose can be used and stored.Glucose is only a storable form of energy, but ATP can be used and stored. . Evaluate | 7 | = ?. In "The Adventures of Theseus," Theseus has a choice: He can take the easier and safer route to Athens by sea, or he can take the more dangerous land route. Theseus decides to travel to Athens by land.How does Theseus's decision help develop the plot? It illustrates the theme. It builds suspense. It describes the climax. It resolves the conflict. PART A: Which of the following identifies a central idea of the text?WOMEN IN THE CIVIL RIGHTS MOVEMENTby Barrett Smith IT'S TIMED PLEASE HELP ASAP! Find the measure of angle B how do you differentite writing from speaking? What is the percent gain ??? A box has the following measurements:Length - 8 cmWidth - 4.2 cmHeight - 3.1 cmThe volume of the box is calculated as length times width times heightComplete the statements to find the box's volume.1. First multiply length times width. Show your work and explain how you placed thedecimal point The ____ is the source of all energy in our atmosphere. a. Sun c. Moon b. water cycle d. Coriolis effect Find the equation of the parabola with a focus at the point (2,5), and a directrix of y = 3. Which is the graph of x298.6? ?95 6 97 98 9 100 101 102 10305 96 97 8 9 100 01 102 103||||-+95 6 7 8 9 100 100 10 103|||| + ++ +++95 6 7 8 9 100 101 102 103 It costs $20 for 4 t shirts. Find the cost of 1 t shirt. Read the excerpt from Narrative of the Life of Frederick Douglass.When we got about half way to St. Michael's, while the constables having us in charge were looking ahead, Henry inquired of me what he should do with his pass. I told him to eat it with his biscuit, and own nothing; and we passed the word around, "Own nothing;" and "Own nothing!" said we all.What is Douglasss purpose in this excerpt?A. to describe the determination of his companionsB. to encourage readers to question authorityC. to persuade others to try new foodsD. to entertain readers with an exciting adventure CAN SOMEONE PLEASE HELP ME . A person weighing 120 pounds has about 20 pints of blood in their body. Which equation below represents the relationship between pints of blood, b, to a person's weight, w? Sheridan Company receives a $14000, 3-month, 8% promissory note from Carla Vista Company in settlement of an open accounts receivable. What entry will Sheridan Company make upon receiving the note?