terms learned so far Flashcards
1
Q
atomic number
A
number of protons in the nucleus of an atom
2
Q
mass number
A
total number of protons and neutrons
3
Q
isotopes
A
atoms of an element with the same atomic number but different mass number
4
Q
cation
A
positive ion
5
Q
element
A
is a substance that consists of only one type of atom
6
Q
atom
A
is the smallest particle that can exist on its own
7
Q
molecule
A
is a particle that consists of two or more atoms chemically bonded together
8
Q
diatomic
A
that there are two atoms covalently bonded in a molecule
9
Q
compound
A
substance formed when two or more elements are chemically combined
10
Q
ionic bonding
A
is the attraction between oppositely charged ions
11
Q
period
A
is a horizontal row in the periodic table
12
Q
group
A
is vertical column in the periodic table
