The configuration ${\mathrm{ns}}^2{\mathrm{np}}^5$ exist in .

Important Questions on Periodic Classification of Elements

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 10

$6^{\mathrm{th}}$ period of periodic table consists of _____ elements. (Write answer in number(s))

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 12

Elements having three incomplete outermost subshells are called _____ elements. ( Answer the block,i.e x-block)

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 13

According to modern periodic law, the properties of the elements are in periodic function of their _____. (Atomic number/ Atomic mass)

HARD

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 14

The general electronic configuration of transition elements is $(\mathrm{n}-1){\mathrm{d}}^{1-\mathrm{a}}{\mathrm{ns}}^{1-2}$. The value of a will be _____. $(6, 7, 10)$

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 15

Separation of a mixture containing compounds of some members of lanthanoids cannot be done by _____ (physical/ chemical) methods.

HARD

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 17

Elements of $2^{\mathrm{nd}}$ period are known as _____. (typical elements / bridge elements)

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 18

The number of transition series in the periodic table is _____.($4/6$)

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 8>Q 20

The elements of group $16$ are also called as _____.  (Chalcogens / Halogens / Pnictogens)