Science
An element 'M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of 'M' is:
- 10
- 12
- 14
- 18
Atomic Structure
6 Likes
Answer
14
Reason — Electrons are in third shell, so, first and second shells must be completely filled i.e., they have 2 and 8 electrons. Now, as third shell has half of second shell, so, there will be 4 electrons in the third shell.
Hence, 'M' will have 2+8+4 = 14 electrons.
Answered By
1 Like
Related Questions
Which one of the following correctly represents Sodium oxide?
An element with atomic number …………… will form a basic oxide.
- 7 (2,5)
- 17 (2,8,7)
- 14 (2,8,4)
- 11 (2,8,1)
Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the body?
- Amoeba
- Mushroom
- Paramoecium
- Lice
Receptors are usually located in sense organs. Gustatory receptors are present in
- tongue
- nose
- eye
- ear