Modern Periodic Table

All the elements are arranged in the increasing order of their _____ number.

All the elements in the periodic table are arranged in the decreasing order of their atomic number.

List the features of the modern periodic table.

How can hydrogen form hydride ions $\left({\mathrm{H}}^{-}\right)$ like halogens?

_____ behaves like alkali metals as well as halogens in its properties.

Hydrogen resembles alkali metals as well as halogens.

Hydrogen resembles alkali metals as well as halogens. Explain.

The Nobel gases are kept in the group $18$ in the modern periodic table.

Noble gases are kept in which group in the Modern periodic table?

Which gases are also known as rare gases? (Halogens/ Noble gases)

Why are noble gases also called as rare gases?

One of the advantages of the modern periodic table is that the electronic configuration of elements is correlated to the position of elements, explain how?

An element with an electronic configuration $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2$ belongs to the _____ period of the modern periodic table.(write in words)

The position of an element in the modern periodic table can be predicted from its electronic configuration more clearly.

The position of an element in the modern periodic table can be predicted from its 

"The modern periodic table correlates the position of the element with its electronic configuration more clearly", justify the statement with an example.

The elements present in boron, carbon, nitrogen, oxygen and fluorine families in addition to noble gases are known as s block elements.

Which elements are called p block elements? 

The family of elements having seven electrons in the outermost shell is:

An element has configuration $2, 8, 1$. It belongs to,