Atomic Structure And Periodic Table Flashcards
1
Q
Atom
A
The smallest unit of matter that has the properties of an element
2
Q
Proton
A
Positively charged subatomic particle in the nucleus (+1)
3
Q
Electron
A
Negatively charged subatomic partial outside of the nucleus ( -1)
4
Q
Neutron
A
Neutral subatomic particle in the nucleus (0)
5
Q
Nucleus
A
Center if on atom, has protons and neutrons
6
Q
Atomic number
A
Number of protons in an atom, it identifies the atom
7
Q
Mass number
A
The number of protons + neutrons
8
Q
Group
A
Coulum on the periodic table has the same number of valence electrons
9
Q
Period
A
Rows on the periodic table
10
Q
Valence electrons
A
Electrons in the outermost energy shell. They determined reactivity.
