Atoms Flashcards
(8 cards)
1
Q
What is an atom?
A
The tiny particles that everything is made up of
2
Q
Size of an atom
A
Radius of 0.1nm
3
Q
What does the nuclear model show
A
A small nucleus surrounded by electrons
4
Q
The nucleus
A
The middle of the atom containing protons and neutrons
1/10 000 of an atom
5
Q
Protons
A
Positively charged (+1) Relative mass of 1
6
Q
Neutrons
A
No charge (neutral) Relative mass of 1
7
Q
Electrons
A
Orbits around the nucleus in electron shells
Negatively charged (-1)
Relative mass of 1/1836
8
Q
Electrical charge in an atom
A
The number of protons (+1) ALWAYS the number of electrons (-1). This means atoms have no OVERALL charge
