Unit 1 Flashcards
(9 cards)
1
Q
Protons
A
2
Q
Electrons
A
3
Q
Neutrons
A
4
Q
Electronic structure
A
5
Q
Group and period
A
Group - last number
Period - amount of number in structure
6
Q
What’s an element?
A
One type of atom - He, O2
7
Q
What’s a compound?
A
More than one element chemically combined - H2O , CO2
8
Q
What’s a mixture?
A
More than one element/compound - seawater , the air
9
Q
What’s a molecule?
A
Two or more atoms which have combined - CO2 , H2
