In the formation of the compound XY₂, an atom X gives one electron to each Y atom. What is the nature of bond in XY₂ ? Draw the electron dot structure of this compound.

An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.

(a) What type of bond will be formed between X and Y ?

(b) Write the formula of the compound formed .

Compare :

(a) sodium atom and sodium ion

(b) chlorine atom and chloride ion

with respect to

1. atomic structure
2. electrical state
3. chemical action
4. toxicity

The electronic configuration of Fluoride ion is the same as that of a neon atom. What is the difference between the two ?