Unit 3: Atomic Structure Flashcards
1
Q
What is a nucleus?
A
A positively charged region in the center of an atom.
2
Q
What are protons?
A
Positively charged subatomic particles in the nucleus.
3
Q
What are neutrons?
A
Neutral charged subatomic particles in the nucleus.
4
Q
What are electrons?
A
Negatively charged subatomic particles around the nucleus.
5
Q
What is the force that holds the nucleus together called?
A
Strong nuclear force
6
Q
Why do electrons orbit the nucleus?
A
Because opposite charges attract.
7
Q
What determines the atomic number of an element?
A
It’s protons.
8
Q
What is an isotope?
A
An element with a differing number of neutrons.
9
Q
What is atomic mass?
A
The number of protons and neutrons in an atom’s nucleus.
10
Q
What are nucleons?
A
Protons and neutrons.
11
Q
What is an ion?
A
An atom with a charge.
