C - Atoms And Elements Flashcards
1
Q
Atoms have a small ________ in the middle, surrounded by _________
A
Nucleus
Electrons
2
Q
The nucleus contains…
A
Protons and neutrons
3
Q
What’s the charge of the nucleus in an atom? Why?
A
Positive. Because protons are positive and neutrons have no charge.
4
Q
What do the electrons do in an atom?
A
They move around the nucleus and occupy the shells around the nucleus
5
Q
Are electrons positive or negatively charged?
A
Negatively charged
6
Q
The number of _______ equals the number of ________
A
Protons and electrons
7
Q
Are atoms overall positive, negative, or not charged?
A
Not charged - neutral
8
Q
What are elements?
A
A substance that only contains 1 TYPE OF ATOM
9
Q
Neutrons have a mass of…
A
0
10
Q
Protons have a mass of…
A
1
11
Q
Electrons have a mass of…
A
-1
