Q2. The table gives the composition of three particles. number of
number
of
number of
electrons
particle
neutrons
protons
A
15
15
16
B
15
18
16
A
с
15
15
17
(a) What is the evidence in the table for each of the following?
Particle A is an atom.
[1]
R. A.

The proton and electrons are equal,

15protons and 15electrons

Explanation:

An atom is the smallest electrical neutral particle of an element so it means that every atom have same number of protons and electrons.

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