In the following table, six elements A, B, C, D, E and F of the modern periodic table with atomic numbers 3 to 18 are given: (a) Which of these is (i) Noble gas (ii) halogen? (b) Which of these is the most active metal in 3rd period? (c) Identify the most electronegative element in the third period. (d) In the compound between B and F what type of bond will be formed? (e) What would be the nature of oxide formed by C?

In the following table, six elements A, B, C, D, E and F of the modern

1.	In the following table, six elements A, B, C, D, E and F of the modern periodic table with atomic numbers 3 to 18 are given: (a) Which of these is (i) Noble gas (ii) halogen? (b) Which of these is the most active metal in 3rd period? (c) Identify the most electronegative element in the third period. (d) In the compound between B and F what type of bond will be formed? (e) What would be the nature of oxide formed by C?
Answer» Solution :(a) NOBLE GAS - GHalogen - F (b)Most active metal – B (c) Most electronegative in 3rd period - F (d) Ionic bond (e) Oxide formed by C would be BASIC.