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

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Answer

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.

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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

Answer

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An element 'M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of 'M' is:10121418

Atomic Structure

Answer

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10
12
14
18

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

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11 (2,8,1)

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nose
eye
ear