atomic structure, Ar , Mr and ions Flashcards
1
Q
size of an atom
A
0.1 - 0.5 nm / 1x 10^-10 - 5 x 10^-10 m
2
Q
on the periodic table, what is the larger number?
A
mass number = number of protons and neutrons
3
Q
on the periodic table, what is the smaller number?
A
atomic number = number of protons and electrons in an atom
4
Q
to find the number of neutrons?
A
mass number - atomic number
5
Q
what is the overall charge in an atom?
A
there is no overall charge in an atom
6
Q
what is an ion?
A
an atom that has lost or gained electrons
7
Q
what is an isotope?
A
an atom which has a different number of neutrons, either more or less
8
Q
what will be different in an isotope?
A
the mass number will be different
