2.1.1 Flashcards
1
Q
What are isotopes
A
Atoms of the same element with the same number of protons but different number of neutrons
2
Q
Why do different isotopes still act exactly in the same way
A
As they contain the same number of electrons
3
Q
What number do isotopes vary in and why
A
Mass number
Due to different number of neutrons in their nuclei
4
Q
What’s the only difference between isotopes
A
Their behaviour in a mass spectrometer
5
Q
What’s relative isotopic mass
A
Mass of an isotope relative to 1/2 the mass of an atom of carbon-12
6
Q
What’s relative atomic mass
A
(Ar)
Weighted mean mass of an atom of an element compared to 1/12 the mass of 1 atom of c-12
7
Q
What’s relative molecular mass (Mr)
A
Average mass of 1 molecule compared to 1/12 the mass of an atom of c-12
8
Q
What’s 1/12 of c-12
A
1
