Question

what is the 'h' here? ​

Answer 1

Answer:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

Step-by-step explanation:

Answer 2

Answer:

the value of h here is 15

it is the size / height of the group

upper limit - lower limit