Questions and Answers
What is valency and how is it related to the charge on the ion of an atom?
Valency is the charge on the ion of an atom. All atoms in a group have the same valency.
What is electronegativity and how does it change across a period?
Electronegativity is the tendency of an atom to attract shared electrons towards itself. Across a period, the electronegativity increases as there are more protons in the nucleus, which can attract electrons more strongly.
What is ionisation energy and how is it related to the atomic radius?
Ionisation energy is the amount of energy required to remove an electron from an atom. The ionisation energy decreases as the atomic radius increases.
What is the relationship between the number of electron shells and the atomic radius?
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Which element has the highest electronegativity?
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