Atoms And Perotic Table Of Elements Flashcards
1
Q
Adom
A
Smallest unit of matter that has properties of an element.
2
Q
Proton
A
Positively charge some atomic particles in the nucleus (+1).
3
Q
Neutron
A
Neutral substance particle in the nucleus (0).
4
Q
Electrons
A
Negatively charged subatomic outside the nucleus (-1)
5
Q
Nucleus
A
Center of an atom has protons and neutrons.
6
Q
Atomic number
A
Number of protons, identifies an atom.
7
Q
Mass number
A
Number of protons and neutrons.
8
Q
Group
A
Column on the periodic table, has the same number of valence electrons.
9
Q
Period
A
Roll on the periodic table.
10
Q
Valence electron
A
Electron in the outer most energy shell, they determine reactivity.
