Structure of an atom Flashcards
1
Q
define atom
A
the smallest particle of an element that still has the same properties as that element
2
Q
what are the three subatomic particles? Charge, location, mass
A
proton: +1, nucleus, 1 a.m.u
neutron: 0 , nucleus, 1 amu
electron: -1, electron cloud, 1/1840 amu
3
Q
what is the atomic number?
A
no. of protons in the nucleus - the smaller number
4
Q
what is the mass number?
A
total no. of protons and neutrons in the nucleus - the bigger no.
5
Q
what is the atomic number equal to?
A
protons = electrons (since atoms are neutral)
6
Q
how to calculate neutrons?
A
mass - atomic
