Chemistry High School

lons form when atoms gain or lose valence electrons. When an atom gains
electrons, it becomes negatively charged, and when an atom loses
electrons it becomes positively charged. Why?

Lons Form When Atoms Gain Or Lose Valence Electrons. When An Atom Gainselectrons, It Becomes Negatively

Answers

Answer 1

Answer:

In neutral atom number of electrons (negativity charged particle) and number of proton ( positively charged particle) are equal.

When one or more electrons are lost so positive charge particle increases and cation is formed.

For example in Na 11 electrons and 11 protons are present when it loses one electrons protons are 11 and 10 electron are remaining so one positive charge is present.

Morever when an element gain electrons one negative charge increases and anion is formed. For example in Cl 17 proton and 17 electrons are present when it gain one electron 18 electrons and 17 protons are now present one negative is more so anion negative ion is formed.

Explanation:

Related Questions

The sum of the atomic masses for any compound is the compound’s:
Empirical mass
Compound mass
Atomic mass
Molar mass

Answers

The correct answer is molar mass


Convert a measurement of 89 cg to its equivalent in mg

Answers

Answer:

1 cg = 10 mg

Explanation:

So, 89cg = 89 * 10 = 890mg!

Pls thank, 5star, and brainliest!

Write the complementary RNA strand for the following DNA strand. TAC ACC TTG ACG

Answers

ATG TGG AAC TGCPlease let me know if I am wrong.

Answer:

ATG TGG AAC TGC

Explanation:

ATG TGG AAC TGC

whoever answers first will get brainliest! this is times so pls help!

You are titrating a 125 mL sample of KOH solution; the pH meter reads 7.00 after the addition of 84.7 mL of 0.750 M HNO3.

What is the concentration of the KOH solution?

A. 0.125 M KOH
B.0.750 M KOH
C.0.508 M KOH
D. 0.0635 M KOH

thanks so much!

Answers

I’m pretty sure it would be D

True or False- Waves are caused by the water being pushed by the wind, which transfers energy, that can cause erosion to the shorelines .

Answers

Answer:

false

Explanation:

Waves are created because othe the lunar pull with out the moon we wouldnt have waves

What is the atomic mass of this atom?

Answers

Answer:

3

Explanation:

The atomic mass is equal to the number of protons in an atom (and electrons if the atom is neutral).

What do scientists think is responsible for this dramatic change in height? Cite evidence from the text to support your answer.​

Answers

Answer:

Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.

Explanation:

i might be right

Why did early people most likely choose to settle in Mesopotamia?

Answers

Answer:

People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.

I hope this helps!

is mass conserved in 2Na+2H2O=2NaOH+H2​

Answers

Answer:

yes mass conservation is in 2Na+2H2O=2NaOH+H2​

Explanation:

it tells how many atoms or molecules of a reactant or a product take part in the reaction

The answers plzzzzzzz

Answers

Answer:

ok, whats the question

Explanation:

Which are not combination reactions?
Check all that apply.
A. 2H2O + 2H2 + O2
B. H2 + Cl2 → 2HCI
C. Fe + MgO + Mg + FeO
D. 2Na + Cl2 → 2NaCl

Answers

Answer:

A and c

Explanation:

In A the product is added to the reactant, so the real reaction is (2H2O = 2H2+O2).

In B hydrogen and clorine are combined to give hydrochloric acid and 2 is used to balance the reaction in the product, so it's a combination reaction .

In C the case is similar to A , so the real reaction is (Fe+MgO = Mg + FeO ) this is displacement reaction where a more reactive element takes place of a less reactive element .

In D sodium reacting with Chlorine to give sodium chloride ,so we conclude that it's a combination reaction .

By February of 1861, how many states seceded from the Union?
5
11
9
7

Answers

11 states seceded the from the union in 1861

Answer:

D. 7

Explanation:

i did it

Balance the equation
AgBr +
GaPO4 →
Ag3PO4 +
GaBi3

Answers

Answer:

3AgBr + GaPO4 ----> Ag3PO4 + GaBr3

Explanation:

Which of the following statements does not describe a physical property of chlorine?
O The color of chlorine gas is green.
O The density of chlorine gas at standard temperature and pressure is 3.17 g/L. OChlorine combines with sodium to form table salt.
O The freezing point of chlorine is -101°C.​

Answers

Answer:

the chlorine gas is green

Explanation:

the density of

The statement that does not give description of physical property of chlorine in the question is   (The color of chlorine gas is green)

A physical property can be regarded as characteristic of matter which is not associated along with a change of it's chemical composition.

Some physical properties of substance can include density, hardness as well as  color, melting and boiling points, or electrical conductivity.

The freezing point ( -101°C ) as well as the density ( 3.17 g/L.) of chlorine  as given in the question are all physical properties because it not considered as been associated with a change chlorine chemical composition.

Therefore, the first option A is correct.

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Help please!!! How many grams are in 3.46 moles of Sulfur?

Answers

Answer:

The answer is: 78.04454 grams

Explanation:

Answer:

IHi the answer is 32.065 grams

what is the change in freezing point of a 1.75 molal solution of nacl in water? the kf for water is 1.86 degrees c/m.

Answers

Answer:

-6.51

Explanation:

Multiply 1.86 x 2 x 1.74 and then you get your answer.

Answer:

As the molality increases by 1 m, there is a corresponding decrease of 1.86°C in the solution’s freezing point.

Explanation:

Anser on EDge

Will these groups of elements form ionic or molecular compounds? sodium and Iodine 

Answers

Answer:

Ionic

Explanation:

Answer:

carbon and hydrogen are molecular

Explanation:

4. How many moles of H, would be
produced from 47 grams of H2SO4?
2A1 +3H,504 → Al2(SO4)3 +3H2

Answers

Answer:

0.48 moles of H₂ are produced.

Explanation:

Given data:

Number of moles of H₂ produced = ?

Mass of H₂SO₄ = 47 g

Solution:

Chemical equation:

2Al + 3H₂SO₄    →    Al₂(SO₄)₃ + 3H₂

Number of moles of H₂SO₄ :

Number of moles = mass/molar mass

Number of moles = 47 g/ 98 g/mol

Number of moles = 0.48 mol

Now we will compare the moles of H₂SO₄ and  H₂

                       H₂SO₄      :        H₂

                           3           :          3

                         0.48       :        0.48

Thus, 0.48 moles of H₂ are produced.

Tectonic Plates
Tectonic Plates
Which of the following is an accurate description of the movement of the tectonic plates in the diagram?
O A. Plate A is sliding past plate B.
O B. Plate A and plate B are diverging.
OC. Plate A and plate B are of equal density and are colliding.
OD. Plate A is denser than plate B, which results in subduction.

Answers

D. Plate A is denser than plate B, which results in subduction.

Please help me ASAP

Answers

3N2 + 3H2 ———> 2NH3.

Which of the following requires more energy then they produce?
Exothermic
Endothermic
(the subject is science but it wasn’t an option)

Answers

Answer:

The answer is endothermic

please help me with this question/

Answers

ur answer is A

hshsbdndnensj

Answer:

4 of each protons and electrons

Explanation:

since the atomic number is 4 it would contain both the same number of protons and electrons

Precipitation falls in these two forms: Solid / Liquid / Gas I’ll give you 77 and read the pdf

Answers

Answer:

It falls in Liquid and Solid.

Explanation:

How many moles are in 6.777 x 1023 atoms of CO2. Watch your significant figures. Question 2 options: 1 atoms CO2 1.125 moles CO2 1.13 moles 1.13 atoms CO2

Answers

Answer:

1.13moles

Explanation:

Given parameters:

Number of atoms  = 6.777 x 10²³ atoms

Unknown:

Number of moles  = ?

Solution:

A mole of a substance contains the avogadro's number of particles

       6.02  x  10²³ particles   = 1 mole

      6.777 x 10²³ atoms will contain [tex]\frac{ 6.777 x 10^{23} }{6.02 x 10^{23} }[/tex]   = 1.13moles

Scott and his classmates were looking at an animal cell under a microscope. They are trying to locate the cell's DNA, which is found in its chromosomes. Where should Scott look to find the chromosomes?

In the mitochondria

In the cell nucleus

In the cytoplasm

In the cell vacuole

Answers

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.

If the temperature of a gas in a balloon remains constant but the pressure
is decreased, the volume of the balloon will
decrease
increase
remain the same
not enough information to predict

Answers

Answer:

increase

Explanation:

if the pressure goes down then the gas will spread out more, meaning the volume will increase

How did modern scientists experiment with Van Gogh's paints to determine their chemical reactions?
1. They used X-ray analysis.
2. They used litmus testing.
3. They burned the paint to examine what elements were left after the chromium was burned off.
4. They studied the density of modern yellow paint to that of 100-year-old paint.

Answers

Answer:

I think the answer is A - they used X-ray analysis.

Explanation:

Answer:They used X-ray analysis

Explanation:

It’s in the text

what does 'potable water' mean?

Answers

Answer:

Potable water, also known as drinking water, comes from surface and ground sources and is treated to levels that that meet state and federal standards for consumption.

PLEASEEE HELP ASAPPPPP


Answers

Answer: answer A

Explanation: because it gives more detail and a summarizations

If she traveled 10 m in 5 seconds, what was her average speed?

Answers

average speed = distance traveled divided by time taken. so 10 divided by 5, which is 2. her average speed was 2m per second. hope this helps!
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