The atomic numbers of three elements `A,B` and `C` are given below:
Element Atomic
`A 3`
`B 9`
`C 11`
Giving reasons state, which two elements will show similar chemical properties.

The atomic number of three element X, Y and Z are 3, 11 and 17 respectively. State giving reason which two elements will show similar chemical properties.

The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State giving reason, which two elements will show similar properties.

The atomic numbers of three elements X, Y and Z are 3, 11 and 17, respectively. State giving reason which two elements will show similar chemical properties.

The atomic numbers of three elements A, B, and Care 12, 18, and 20 respectively. State, giving reason, which two elements show similar properties.

The atomic number of elements P, Q, R, S and T are given. Which two elements are chemically similar?

The atomic numbers of elements A, B, C, D and E are given below : From the above table, answer the following questions - (a) Which two elements are chemically similar ? (b) Which is an inert gas ? (c) Which element belongs to 3^(rd) period of periodic table ? (d) Which element among these is a non-metal ?