Exercise 7 | The Atomic Theory

Here are four pairs of elements:

A)     158 X and 147 X

B)     158 X and 148 X

C)      157 X and 168 X+

D)     168 X and 147 X2-

 

Which of the following pairs are isotopes of the same element? 

In which of the following pairs do both atoms have the same number of neutrons? 

In which of the following pairs do both atoms have the same number of electrons?

Which of the following pairs are isotopes of the same element? B

In which of the following pairs do both atoms have the same number of neutrons? A

In which of the following pairs do both atoms have the same number of electrons? B and C