elements etc Flashcards
1
Q
hydrogen
A
just one protron and one electron
1-H (also protium)
2
Q
hydrogen nucleus
A
proton
3
Q
helium
A
two protons, two electrons, two neutrons
4
Q
helium nucleus
A
two protons, two neutrons
5
Q
deuterium
A
1 protons, 1 electron, 1 neutron
heavy hydrogen, isotope
neutral atom
6
Q
deuterium nucleus
A
1 proton, 1 neutron
7
Q
isotope
A
contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties
8
Q
Helium-3
A
2 protons, 1 neutron, 2 electrons
9
Q
Helium 3 nucleus
A
2 protons, 1 neutron
10
Q
3-H
A
tritium
1 proton, 2 neutrons, 1 electron
11
Q
HI
A
neutral atomic hydrogen, 60% of the gas in the Milky Way
12
Q
HII
A
ionized hydrogen
13
Q
H_2
A
molecular hydrogen, 2 hydrogens? molecular clouds, 17% of gas in the Milky Way
