Size And Mass Of Atoms Flashcards
1
Q
Almost all of the mass in an atom is in the _________________
A
Nucleus
2
Q
Relative mass of a proton is
A
1
3
Q
Relative mass of a neutron is
A
0
4
Q
Relative mass of an electron is
A
Very small
5
Q
The sum of protons and neutrons in an atom is the _________ _____________
A
Mass number
6
Q
Isotopes are when an element has the same number of protons but a different number of ________________
A
Neutrons
7
Q
mass number - the atomic number= ?
A
Number of neutrons
8
Q
Number of protons + number of neutrons =?
A
Mass number
9
Q
What are the sub-atomic particles in the nucleus
A
Protons and neutrons
10
Q
Sub-atomic particles which orbit the nucleus are called ___________
A
Electrons
11
Q
What does RAM stand for?
A
Relative Atomic Mass
12
Q
What does RFM stand for?
A
Relative Formula Mass
