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 , the simplest formula for this compound is:
1.
2.
3.
4.
The formula of the stable binary compounds that would be formed by
an element having atomic number 71 and fluorine:
1. | LuF6
|
2. | LuF2
|
3. | LuF3
|
4. | LuF4 |