atomic structure Flashcards
1
Q
what does the nucleus of an atom consist of?
A
neutrons and protons
2
Q
what do electrons do?
A
orbit around the nucleus in fixed shells
3
Q
what is the protons:
relative charge?
relative mass?
location?
A
charge: +1
mass: 1
location: nucleus
4
Q
what is the neutrons:
relative charge?
relative mass?
location?
A
charge: 0
mass: 1
location: nucleus
5
Q
what is the electrons:
relative charge?
relative mass?
location?
A
charge: -1
mass: very small
location: shells
6
Q
what is the proton (and electron) number for sodium?
23
Na
11
A
11
7
Q
what is the mass number for sodium?
23
Na
11
A
23
8
Q
what is the neutron number for sodium?
23
Na
11
A
23-11 =12
