State electron affinity unit.

One Line Answer

Electron volts per atom (eV/atom) or kJ mol⁻¹.

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Chapter 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 6. (a) (ii) | Page 15

Element X is a metal with a valency 2, Y is 3 non- metal with a valency 3.

1) Write an equation to show how Y from an ion.

2) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.

Arrange the elements of second period in increasing order of their electron affinity. Name the elements which do not follow the trend in this period.

Give reason:

Electronegativity of chorine is higher than Sulphur?

Which has higher E.A. fluorine or Neon?

Why is the electron affinity of fluorine less than chlorine?

Fill in the blank
Energy released when electron is added to a neutral gaseous atom is called ______.

State whether the following statement is true or false
Al₂O₃ is an amphoteric oxide.

Explain
Halogens have high electron affinity.

The electron affinity of an element X is greater than that of element Y.

How is the oxidising power of X likely to compare with that of Y?
How is the electronegativity of X likely to compare with that of Y?
State whether X is likely to be placed to the left or to the right of Y in the periodic table?