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2 years ago

Please help 15 points

Chemistry

1 answer:

sleet_krkn [62]2 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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