Atomic Structure Flashcards
1
Q
What is an atom made up of?
A
Protons
Neutrons
Electrons
2
Q
What is at the centre of every atom?
A
Nucleus
3
Q
What are protons and neutrons also known as?
A
Nucleons
4
Q
What orbits the nucleus at relatively large distances?
A
Electrons
5
Q
What us the relative charge of a proton?
A
+1
6
Q
What is the relative mass of a proton?
A
1
7
Q
What is the relative charge of a neutron?
A
0
8
Q
What is the relative mass of a neutron?
A
1
9
Q
What is the relative charge of an electron?
A
-1
10
Q
What is the relative mass of an electron?
A
0.0005
11
Q
What is the proton number?
A
Number of protons in the nucleus
12
Q
What is the proton number also known as?
A
Atomic number
13
Q
What defines the element?
A
Proton number
14
Q
In a neutral atom, what does the number of electrons equal?
A
Number of protons
15
Q
What is the nucleon number also called?
A
Mass number
