They have different charges and different masses.
Explanation:
Atom Protons Electrons Neutrons
a 6 6 6
R 7 8 7
The two atoms have different masses and different charges.
The mass of an atom is the sum of its number of protons and neutrons.
The charge is the difference between protons an electrons in the atom.
For atom a;
Mass = 6 + 6 = 12
charge = 6 - 6 = 0
For R:
mass = 7+ 7 = 14
charge = 7 - 8 = -1
We see that they have different masses and different charges.
learn more:
Number of subatomic particles brainly.com/question/2757829
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