C1- Atomic Structure Flashcards
1
Q
What do atoms contain?
A
Protons, neutrons and electrons
2
Q
What is the nucleus in an atom?
A
In the middle of the atom
Contains neutrons and protons
Has a positive charge due to the protons
3
Q
What are the electrons in an atom?
A
They move around the nucleus in electronic shells
Negatively charged and tiny
Electrons have no mass
4
Q
What charge are atoms?
A
Neutral
5
Q
Why are atoms neutral?
A
They have the same amount of electrons and protons so the cancel out each other creating a neutral charge
6
Q
What is an ion?
A
An atom that the number of protons doesn’t equal the number of electrons and has an overall charge
7
Q
What does the atomic number tell us?
A
How many protons there are
8
Q
What does the mass number tell us?
A
The total number of protons and neutrons in the atom
