atomic structure Flashcards
1
Q
atom
A
The smallest part of an element that can exist
2
Q
molecule
A
a particle that consists of two or more atoms chemically bonded together.
3
Q
element
A
A substance that is made of only one sort of atom
4
Q
compound
A
a substance that contains two or more elements that are chemically combined
5
Q
mixture
A
consists of two or more different substances, not chemically joined together.
6
Q
do pure substances have a fixed boiling and melting point
A
yes
7
Q
do mixtures have a fixed boiling and melting point
A
no they melt or boil at a range of temperatures
8
Q
atomic number
A
The number of protons in an atom.
9
Q
mass number
A
The number of protons and neutrons in an atom
10
Q
isotopes
A
Atoms of the same element (same number of protons) but with a different number of neutrons.
11
Q
A
atomic number and mass number
