Vocab Flashcards
1
Q
Radioactivity
A
spontaneous emissions of particles/radiation form unstable nuclei
2
Q
Alpha rays
A
positively charged
3
Q
Beta rays
A
electrons, negative charge
4
Q
Gamma rays
A
high energy with no charge
5
Q
Atomic number
A
found by number of protons and neutrons in atom of element
6
Q
Mass number
A
total number of neutrons and protons (nucleons)
7
Q
How to get mass number
A
number of protons (z)+number of neutrons
8
Q
How to find number of neutrons
A
Difference between (A-z) Mass number-protons
9
Q
Isotope
A
atoms that have same atomic number or protons (z) but different mass number (A)
10
Q
Atomic mass
A
mass of atom in mass units
11
Q
Average atomic mass
A
mass of mixture of naturally occurring isotopes
12
Q
Period
A
horizontal rows
13
Q
Metalloid
A
element with properties in-between metal and non-metal
14
Q
Group
A
vertical column
15
Q
Avogadro’s number
A
~6.022x10^23
