atomic structure Flashcards
1
Q
what is atomic number?
A
number of protons
2
Q
what is atomic mass?
A
number with decimals at bottom
3
Q
mass number
A
protons plus neutrons or rounded atomic mass
4
Q
of protons
A
atomic number
5
Q
of neutrons
A
mass number - number of protons
6
Q
of electrons
A
same number as protons to balance out charge
7
Q
location of protons?
A
in the nucleus
8
Q
charge of protons?
A
positive
9
Q
location of neutrons?
A
in the nucleus
10
Q
charge of neutrons?
A
no charge
11
Q
location of electrons?
A
outside the nucleus in the empty space
12
Q
charge of electrons?
A
negative
13
Q
writing the nuclide or isotopic symbol/notation
A
mass number on top and protons on bottom
14
Q
contributions of Democritus
A
Matter is made up of atomos, indivisble
15
Q
contribution of John Dalton
A
proved the theory of the atom
