Question

write the formula of the compound formed by the reaction between A and D in periodic table​

Answer 1

Answer:I think that it is insufficient question to calculate the formula of compounds,,,,i give 1 example in what way we calculate the formula of compounds,,,,,,by a method"CRISS CROSS"

Explanation:

Answer 2

The formula of the compound formed by the reaction between A and D in periodic table​

Explanation:

Periodic table

1. A tabulated form where elements are orderly arranged on the basis of increasing atomic numbers .
2. Due to repetition of similar type of electronic configuration ,we get to see periodicity in properties .
3. The elements on :

• Extreme left : Metals
• In extreme right : Non metals

Metals

They have tendency to loose electron and by loosing they form electropositive ions .

Non metals

They have tendency to accept electrons and by doing so they form electronegative ions .

When metal and non metal combines , they form ionic bond .

Ionic bond

The bond formed by transfer of electrons .

Let us study to make compounds between element A and B :

Let us make a bond between metal and non metal by taking an example where A is taken as Na(sodium ) and B is taken as Cl(chlorine ).

Na                      Cl

(At. no.11)      (At, no. 17 )

E.c-2,8,1             2,8,7

Now , with valencies they are written as :

Na⁺     Cl⁻

After criss crossing , we get :

NaCl

Similarly , for magnesium chloride

Mg²⁺               Cl⁻

After criss crossing , we get

Mg Cl₂

This question is answered by considering question as : The formula of the compound formed by the reaction between A and D in periodic table​.

Where A belongs to group in extreme left and B belongs to the group on extreme right.