Answer the following question from given electronic configuration.
| Elements | Electronic configuration |
| A | 1s2 , 2s2 2p6 , 3s1 |
| B | 1s2 , 2s2 2p6 , 3s2 3p6 , 4s1 |
| C | 1s2 , 2s2 2p6 , 3s2 3p5 |
- Identify period, group, valency, metal/non-metal, block of given elements.
- Name the given elements
- Which compound can be formed between A with C and B with C.
- What types of compounds are these and why?
- Which is more reactive between A and B, Why?
1 Answer
1.
| Element | Period | Group | Valency | Metal/Non-metal | Block |
| A | 3 | I A | 1 | Metal | S-block |
| B | 4 | I A | 1 | Metal | S-block |
| B | 3 | VII A | 1 | Non-Metal | P-block |
2.
The elements are:
A- Sodium (Na)
B- Potassium (K)
C- Chlorine (Cl)
3.
A and C form NaCl.
B and C form KCl.
4.
NaCl and KCl are ionic or electrovalent compounds because they have ionic or electrovalent bong.
5.
B is more reactive than A because B has larger size, less nuclear power and hence it loses electron easily than A.
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