The tenth element in the periodic table resides in:

1. the second period

2. the fourth period

3. the fifth period

4. the eight period

Which of the following order is not in accordance with the property stated against it?                                                                                                      

1. F₂ > Cl₂ > Br₂ > l₂ Oxidising Power

2. Hl > HBr >HCl >HF Acidic property in water

3. F₂ > Cl₂ > Br₂ > l₂ Electronegativity

4. F₂ > Cl₂ > Br₂ > l₂ Bond dissociation energy

The outermost electronic configuration of the most electronegative element is :

1. ns²np³

2. ns²np⁴

3. ns²np⁵

4. ns²np⁶

The most non-metallic element among the following is:

1. Be

2. B

3. Mg

4. Al

Correct statement regarding transuranic elements is :

1. They have higher atomic number than uranium.

2. They are lighter than uranium.

3. They have lower atomic number than uranium.

4. They have same atomic number as uranium.

Which of the following has the least density?

1. Na

2. Li

3. Mg

4. K

Eka aluminium and Eka silicon are now known as:

Which of the following exhibits variable oxidation states?

The lightest metal in the periodic table is:

1. H

2. Mg

3. Ca

4. Li

The difference between ions and atoms is of:

1. relative size

2. Configuration

3. presence of charge

4. All of these