2: Atomic Structure Flashcards
(5 cards)
1
Q
How do electron pairs arrange themselves in compounds?
A
To minimise repulsion
2
Q
Relative mass of an electron?
A
0.0005
3
Q
Relative Atomic Mass Definition
A
The weighted mean mass of an atom of an element, compared to 1/12th of the mass of an atom of carbon-12
4
Q
Relative Isotopic Mass Definition
A
The mass of an atom of an isotope, compared with 1/12th of the mass of an atom of carbon 12
5
Q
First Ionisation Energy Definition
A
the energy needed to remove 1 electron from each atom in 1 mole of gaseous atoms to form 1 mole of gaseous 1+ atoms
