Atomic Structure Flashcards
1
Q
Two main regions of an atom
A
Nucleus and outside shells
2
Q
Atoms contain what 3 particles with what charges
A
Protons (positive charge), neutrons (neutral charge), and electrons (negative charge)
3
Q
Particles that account for most of the mass in an atom
A
Protons and neutrons
4
Q
What the atomic number says about an element
A
The amount of protons
5
Q
What are valence electrons
A
Electrons on the outer shell
6
Q
What are molecules
A
Atoms bonded together
7
Q
What are ions
A
An atom or molecule with a positive or negative charge
