1 - Atomic structure Flashcards
1
Q
Relative mass of an electron
A
1/1836
2
Q
Atomic number
A
Number of protons
3
Q
Mass number
A
Number of protons and neutrons
4
Q
Nucleon number
A
Number of protons and neutrons
5
Q
Atom definition
A
The smallest part of an element that can take part in a chemical reaction
6
Q
Orbital definition
A
The space where there is a probability of finding electrons
6
Q
Symbol for mass number
A
A
7
Q
Symbol for atomic number
A
Z
8
Q
Atomic radius definition
A
Distance from the centre of the nucleus to the outermost stable electron
9
Q
What happens to atomic radius across a period?
A
Decreases
10
Q
What happens to atomic radius down a group?
A
Increases
11
Q
What happens to ionic radius across a period?
A
Decreases
12
Q
What happens to ionic radius down a group?
A
Increases
