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Natasha2012 [34]
3 years ago
5

Which statement describes the distribution of charge in an atom?

Chemistry
2 answers:
polet [3.4K]3 years ago
6 0

The statement that describes the distribution of charge in an atom is   \boxed{\left({\text{3}}\right){\text{ A positively charged nucleus is surrounded by one or more negatively charged electrons}}}

Further explanation:

The smallest particle that is the building block of matter is known as an atom. Most of the space in an atom is empty, and its mass is concentrated inside a small region called the nucleus.

Protons, electrons, and neutrons are the three subatomic particles that are present in the atom. The sum of protons and neutrons are called nucleons because these are located in the nucleus of the atom. Electrons revolve around the nucleus in definite orbits. The positively charged subatomic particle is called proton. Neutron is a subatomic particle that has no charge. Electron is the negatively charged subatomic particle. The number of electrons is equal to the number of protons in a neutral atom.

As we know, the nucleus consists of protons and neutrons. Protons are positively charged whereas neutrons are neutral and therefore the overall charge on the nucleus becomes positive. Electrons are negatively charged species. These revolve around the nucleus in circular orbits. So a positively charged nucleus is surrounded by one or more negatively charged electrons. Hence statement (3) is correct, and the statement (1), (2) and (4) are incorrect.

Learn more:

1. The subatomic particle with the least mass: <u>brainly.com/question/2224691 </u>

2. Bohr’s model of the atom: <u>brainly.com/question/2965079 </u>

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: electrons, atom, charge, protons, nucleus, neutrons, negatively charged, positively charged, neutral, nucleons, building block of matter, subatomic particle, positively charged nucleus, negatively charged electrons.

miv72 [106K]3 years ago
3 0

The correct answer is:

A positively charged nucleus is surrounded by one or more negatively charged electrons

The explanation:

when:

proton is a positively charged elementary particle that is a fundamental constituent of all atomic nuclei.

neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The particle derives its name from the fact that it has no electrical charge

electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom .  

so, , there are positively charged protons and zero-charged neutrons in the nucleus of an atom. Therefore, the nucleus is positively charged, Surrounding the nucleus, the electrons have negative charge. 

Thus, the correct answer is (3): A positively charged nucleus is surrounded by one or more negatively charged electrons is correct.

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3 0
3 years ago
What volume change occurs to a 400.0 mL gas sample as the temperature increases from 22.0 °C to 30.0°C?
nasty-shy [4]
V₁ = 400.0 mL

T₁ = 22.0ºC + 273 = 295 K

V₂ = ?

T₂ = 30.0ºC + 273 = 303 K

V₁ / T₁ = V₂ / T₂

400.0 / 295 = V₂ / 303

295 x V₂ = 400.0 x 303

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4 0
3 years ago
Compound Y has a distribution coefficient of 4.0 when extracted from water with chloroform, with Y being more soluble in chlorof
Aleks04 [339]

Answer:

There are needed 3 extractions to extract at least 95%

Explanation:

The distribution coefficient of a compound is defined as the ratio in concentration of the compound in the organic solvent and the concentration in the aqueous solution:

K = Concentration organic solvent / Concentration in water

Assuming as initial amount of the organic solvent: 100% and X as the amount of Y that is extracted

<em>First extraction:</em>

4 = X / 10mL / (100-X) / 50mL

4 = 50X / 1000-X

4000 - 4X = 50X

4000 = 54X

X = 74.1%

In the first extraction, 74.1% of Y is extracted

And will remain: 100 - 74.1 = 25.9%

<em>Second extraction:</em>

4 = X / 10mL / (25.9-X) / 50mL

4 = 50X / 259-X

1036 - 4X = 50X

1036 = 54X

X = 19.2%

In the second extraction, 19.2% of Y is extracted

And will remain: 25.9 - 19.2 = 6.7%

<em>Third extraction</em>

4 = X / 10mL / (6.7-X) / 50mL

4 = 50X / 67-X

268 - 4X = 50X

268 = 54X

X = 5.0%

In the first extraction, 5.0% of Y is extracted

And are extracted:

74.1% + 19.2% + 5.0% = 98.3%

That means there are needed 3 extractions to extract at least 95%

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