The elements A, B, C, D and E have atomic num | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) To determine if elements belong to the same group,we must write their electronic configurations:$A$ (atomic number $9$): $2, 7$ (Group $17$)$B$ (a

Vedclass · Accepted Answer

$A$ and $C$

Vedclass · Answer

(A) To determine if elements belong to the same group,we must write their electronic configurations:$A$ (atomic number $9$): $2, 7$ (Group $17$)$B$ (atomic number $11$): $2, 8, 1$ (Group $1$)$C$ (atomic number $17$): $2, 8, 7$ (Group $17$)$D$ (atomic number $12$): $2, 8, 2$ (Group $2$)$E$ (atomic number $13$): $2, 8, 3$ (Group $13$)Elements with the same number of valence electrons belong to the same group.Here,$A$ and $C$ both have $7$ valence electrons,so they belong to the same group (Group $17$).

The elements $A, B, C, D$ and $E$ have atomic numbers $9, 11, 17, 12$ and $13$ respectively. Which pair of elements belong to the same group?

Similar Questions

"Hydrogen occupies a unique position in the Modern Periodic Table". Justify the statement.

Which of the following is the outermost shell for elements of period $2$?

Write the atomic numbers of two elements $X$ and $Y$ having electronic configurations $2, 8, 2$ and $2, 8, 6$ respectively.

Which of the following is the outermost shell for elements of period $2$?

The atomic number of an element is $17$. Predict $(a)$ its valency,$(b)$ whether it is a metal or non-metal,$(c)$ its relative size with respect to other members of its group. Justify your answer in each case.

Vedclass Test Series

Exam Paper Generator

Online Exam Module