2.1 Atomic structure and isotopes Flashcards
1
Q
What 2 subatomic particles are in the nucleus of an atom
A
- Protons
- Neutrons
2
Q
What are electrons arranged on
A
Shells
3
Q
What other subatomic particle has the same mass as a proton
A
A neutron
4
Q
What is the mass of an electron
A
1/1800
5
Q
What is the charge of a proton
A
1+
6
Q
What is the charge of an electron
A
1-
7
Q
What is the overall charge of an atom
A
Neutral
8
Q
What subatomic particle defines the element
A
The protons
9
Q
What is an atomic number
A
The number of protons in the atom
10
Q
Define an isotope
A
Atoms of the same element with different number of neutron and different masses
11
Q
What letter represents the mass number
A
A
12
Q
How do you calculate the mass number
A
number of protons + number of neutrons
13
Q
What letter represents the atomic number
A
Z
14
Q
Why do isotopes have similar chemical reactivity
A
- Isotopes have the same number and arrangement of electrons
- Neutrons have no effect on reactions
15
Q
Define an ion
A
A charged atom
