Question

do all carbon atoms have an atomic number of 6, but some have mass number of 12 and others have mass number of 14. what is the same?

Answer 1

Answer:

they all are other isotopes!!!! they have the same atomic no but different mass no

Answer 2

Answer:

Atomic number of any element is = no. of protons

Mass no. = no. of protons + no. of neutrons

So the two carbon atoms:

Both have same number of protons i.e. 6

but  the first one has 6 neutrons ( so mass number = 6p + 6n = 12)

and the second one has 8 neutrons ( so mass number = 6p + 8n = 14)

Such atoms are called isotopes

Explanation: