3.1 vocab Flashcards
1
Q
Nucleus
A
The central core of an atom containing protons and usually neutrons
2
Q
Proton
A
Small, positively charged particle in the nucleus of an atom
3
Q
Neutron
A
Small Uncharged particle of an atom
4
Q
Electron
A
A tiny, negatively charged, high-energy particle that moves in the space outside the nucleus of an atom
5
Q
Atomic Mass Unit (amu)
A
A unit measurement for the mass of particles in atoms
5
Q
Atomic Number
A
The number of protons in the nucleus of an atom
6
Q
Valence Electrons
A
The electrons that are farthest away from the nucleus of an atom and involved in chemical reactions
7
Q
Electron dot diagram
A
A representation of the number of valence Electrons in an atom, using dots place around the symbol of an element
