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love history [14]
3 years ago
8

Please help 15 points

Chemistry
1 answer:
sleet_krkn [62]3 years ago
7 0
<h3>Further explanation </h3>

Given

Atomic symbol

<h3> Required </h3>

Atomic composition

Solution

Atomic number = number of protons = number of electrons

Mass Number (A) is the sum of protons and neutrons

Number of protons and Number of Neutrons  in nucleus

Number of electrons in the shell

From the picture:

protons = 3

neutrons = 4

electrons = 3

atomic number = protons = electrons = 3

mass number = protons + neutrons = 3+4 = 7

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Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air.
lesya692 [45]

Answer:

<em>The first three options given out of the five options are correct.</em>

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Explanation:

An electronic air sampler is a device that is used by people to check apprehension of contamination having individuals with the help of certain volume of air sampling.

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ANTONII [103]

Answer:

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b . Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl,

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3 0
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