Incorrect statement about metal is:

1. Metals can donate electrons.
2. Metals form ionic compounds.
3. Metals are more electronegative.
4. Metals have less ionization energy.

The correct order of metallic character of elements B, Al, Mg and K  is :

The increasing order of non-metallic character of the elements N, P, O, and S is: 

1. P < S < N < O

2. O < S < N < P 

3. O < N < S < P 

4. N < S < O < P

Magnesium reacts with an element (X) to form an ionic compound.
If the ground state electronic configuration of (X) is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^3$,
the simplest formula for this compound is: 

1. ${\mathrm{Mg}}_2{\mathrm{X}}_3$

2. ${\mathrm{MgX}}_2$

3. ${\mathrm{Mg}}_2\mathrm{X}$

4. ${\mathrm{Mg}}_3{\mathrm{X}}_2$

The correct order among the following options is: 

1. F > N > C > Si > Ga - Non-metallic character.

2. F > Cl > O >N - Oxidising property.

3. C < Si > P > N  - Electron affinity value.

4. All of the above.

The order of basic character of given oxides is:

1. Na₂O > MgO > Al₂O₃ > CuO

2. MgO > Al₂O₃ > CuO > Na₂O

3. Al₂O₃ > MgO > CuO > Na₂O

4. CuO > Na₂O > MgO > Al₂O₃

The formula of the stable binary compounds that would be formed by 
an element having atomic number 71 and fluorine:

Considering the elements B, C, N, F, and Si; the correct order of their non-metallic character is :