Atoms and Elements Flashcards
1
Q
Describe a NUCLEUS
A
In the MIDDLE of an atom
Contains PROTONS and NEUTRONS
POSITIVE charge
TINY compared to the size of the atom (grain of sand in a room)
2
Q
What charge does a PROTONS have?
A
Positive
3
Q
What charge does a NEUTRONS have?
A
No charge - Neutral
4
Q
Describe Electrons
A
Move AROUND the nucleus
NEGATIVELY charged
They’re TINY, but they cover A LOT of space
They occupy SHELLS around the nucleus
5
Q
What charge does an ATOM have?
A
No charge overall
6
Q
Number of Protons = …
A
… the Number of Electrons
7
Q
The charge on the electrons is the [ ] size as the charge on [ ] but opposite
A
Same
Protons
8
Q
If some electrons are ADDED or REMOVED…
A
… then the atom becomes CHARGED and then is an ION
9
Q
[ ] consist of ONE TYPE of atom only
A
Element
10
Q
How many ELEMENTS are there?
A
About 100
