2.1 Study Guide Flashcards
1
Q
What is the charge of a proton?
A
Positive
2
Q
What do protons do?
A
Determine the atom
3
Q
What is the charge of a neutron
A
neutral
4
Q
What does a neutron do?
A
determine atomic mass
5
Q
What is the charge of electrons?
A
negative
6
Q
what do electrons do?
A
Keep atom stable
7
Q
What is an isotope?
A
an atom with a different mass then the original atom
8
Q
Why are isotopes useful?
A
They give an idea of changes in things.
9
Q
How many protons are in an atom with 9 electrons
A
9
10
Q
Do protons and neutrons have to be the same in every atom?
A
no, isotopes have different amounts of neutrons.
