concept review exercise q's Flashcards
1
Q
what is the mass number of an element
A
the mass number is the sum of the protons and neutrons in an atom.
2
Q
how do isotopes of an element differ from each other?
A
Isotopes of an element have the same number of protons but different numbers of neutrons.
3
Q
what is the relationship between the number of protons and the number of electrons in an atom?
A
the number of protons and the number of electrons is the same, they have the same number of electrons & protons.
4
Q
why is the atomic number so important to the identity of an atom?
A
the atomic number defines the identity of an element. its also the number of protons in the nucleus.
5
Q
A
