Atom Study Guid Flashcards
1
Q
When does an atom become an ion?
A
when it loses or gains electrons
2
Q
How do you find the number of neutrons
A
Subtract the atomic number from the mass number
3
Q
How do you determine the number of protons in an atom?
A
The number of protons is the atomic number
4
Q
How is the model of an atom changed overtime?
A
Changed for new information
5
Q
Isotopes exist because atoms of the same element can have different numbers of
A
Neutrons
6
Q
What force holds the electrons in atoms?
A
The electromagnetic force
