The electronic configuration of four elements is:

(i) W: 2,6
(ii) X: 2,8
(iii) Y: 2,8,1
(iv) Z: 2,8,7

Which pair of atoms will form a covalent compound.

1. Two atoms of W
2. Two atoms of X
3. An atom of W & an atom of X
4. An atom of Y & an atom of Z

Element with an atomic number 19 will:

1. Accept an electron & get oxidized
2. Accept an electron & get reduced
3. Lose an electron & get oxidized
4. Lose an electron & get reduced

The non-metallic properties of elements from left to right in a Periodic Table:

1. Increases
2. Decreases
3. Remains same
4. First increases & then decreases

The electronic arrangements of six atoms, A to F is shown below.

A: 2,5    B: 2    C: 2,6    D: 2,8,6    E: 2,8,8    F: 2,8,3

The atoms from the same group of the periodic table:

1. D & E
2. C & D
3. E & F
4. C & E