atoms Flashcards
1
Q
atoms
A
the smallest particle
2
Q
elements
A
a pure chemical substance that cannot be physically split
3
Q
molecule
A
the smallest particle of a substance that can exist
4
Q
compound
A
a substance of atoms from two or more elements
5
Q
proton
A
a particle of matter that has a positive electrical charge and forms
6
Q
neutron
A
a particle of matter that has no electrical charge and forms
7
Q
electron
A
a part of matter that has a negative electrical
8
Q
atomic number
A
number of protons top number in the element box
9
Q
mass number
A
number of protons plus neutrons bottom number in the element box
10
Q
subscript
A
tiny number to the right of the element symbol
11
Q
chemical
A
a one or two letter representation of element
