Some elements are given above in their own symbol and position in the periodic table,

Question

Group numbers

Some elements are given above in their own symbol and position in the periodic table, while others are shown with a letter. With reference to the table: 

1. Which is the most electronegative ? 

2. How many valence electrons are present in G ? 

3. Write the formula of the compound between B and H. 

4. In the compound between F and J, what type of bond will be formed ?

5. Draw the electron dot structure for the compound formed between C and K.

Answer 1

1. J (which is fluorine) is the most electronegative element.

2. G has group no. 15 or VA that means it will have 5 electrons in its outermost shell.

3. B has 1 valence electron so its valency will be + l. It will be represented as B¹⁺ H has 6 valence electrons so its valency will be – 2. It will be represented as H^2- 

4. Since F belongs to 14th group or IVA group. It has four valence electrons which means it will share electrons and the bond will be covalent. 

5. C has two valence electrons and K has seven valence electrons K needs 1 electron to complete its octet and C needs to lose 2 electrons.