Consider the following information about three atoms: (a) How are they similar to one another? (b) How

Question:

Consider the following information about three atoms:

(a) How are they similar to one another?
(b) How do they differ from one another?
(c) What are the members of such a group of atoms called?
(d) Using the planetary model, draw the atomic configuration of 126C showing the relative position and numbers of its subatomic particles.