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1.2 Relative atomic mass & electronic charge

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Total cards: 10•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

What is the relative atomic mass?

Back (Answer)

The average mass value which takes the mass and abundance of isotopes of an element into account, on a scale where the mass of Carbon-12 is 12.

#2
Front (Question)

Give the electronic configuration of He (2)

Back (Answer)

2

#3
Front (Question)

Give the electronic configuration of Be (4)

Back (Answer)

2, 2

#4
Front (Question)

Give the electronic configuration of F (9)

Back (Answer)

2, 7

#5
Front (Question)

Give the electronic configuration of Na (11)

Back (Answer)

2, 8, 1

#6
Front (Question)

What are ions?

Back (Answer)

Ions are charged particles. They are formed when atoms lose electrons (positive ions) or gain (negative ions) electrons. E.g. The sodium positive ion, Na+, has an electronic configuration of 2,8 (same as Ne). An atom of sodium has lost one electron.

#7
Front (Question)

Give the electronic configuration of Ca (20)

Back (Answer)

2, 8, 8, 2

#8
Front (Question)

Back (Answer)

#9
Front (Question)

State the relative masses and relative charges of the proton, neutron and electron

Back (Answer)

Masses Proton: 1 Neutron: 1 Electron: 1/2000 Charges Proton: +1 Neutron: 0 Electron: -1

#10
Front (Question)

Explain why atoms have no overall charge

Back (Answer)

They have the same number of electrons and protons