Atoms Flashcards
1
Q
What is an isotope ?
A
Atoms with the same atomic number( same number of protons) but different mass number ( different number of neutrons
2
Q
What is relative atomic mass ?
A
The weighted average mass of the isotopes of that element
3
Q
What is atomic number?
A
The number of protons in the nucleus of an atom
Also the number of electrons
4
Q
What is mass number ?
A
Number of protons + number of neutrons in the nucleus of an atom
5
Q
What is a relative charge and mass of proton ?
A
Charge= +1
Mass=1
6
Q
What is the relative charge and mass of a neutron ?
A
Charge=0
Mass=1
7
Q
What is the relative charge and mass of an electron ?
A
Charge=-1
Mass=1/1836
=0
