Chemistry
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
Two noble gases:
- A & B
- E & F
- B & E
- D & E
Answer
B & E
Reason — The electronic configuration of six atoms is given below :
| Atom | Electronic configuration | Valence electrons |
|---|---|---|
| A | 2, 5 | 5 |
| B | 2 | 2 |
| C | 2, 6 | 6 |
| D | 2, 8, 6 | 6 |
| E | 2, 8, 8 | 8 |
| F | 2, 8, 3 | 3 |
Atom B (2) and E (2, 8, 8) both have completely filled outermost electron shells. Their electronic configurations reflect stable duplet and octet arrangements. Hence, B and E are nobel gases.
Related Questions
The non-metallic properties of elements from left to right in a Periodic Table:
- Increases
- Decreases
- Remains same
- 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:
- D & E
- C & D
- E & F
- C & E
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 atom which is the most electronegative:
- A
- B
- C
- F
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 atom which has the highest ionization potential:
- A
- B
- E
- F