Noble gases are placed in_____________ group in the modern periodic table.

(a)

13^th

(b)

18^th

(c)

17^th

(d)

2^nd

Group 16 elements are collectively called as__________

(a)

chalcogen family

(b)

carbon family

(c)

halogens

(d)

nitrogen family

d-block elements are otherwise known as_______

(a)

transition elements

(b)

inner transition elements

(c)

halogens

(d)

alkali metals

Assertion (A): Noble gases are chemically inert in nature.
Reason (R) : Noble gases have stable electronic structures

(a)

Both A & R are right

(b)

Both A & R are wrong

(c)

A is right R is wrong

(d)

A is wrong R is right

What are alloys?

What are metalloids? Give examples

Relate the names of the following scientists with the statements given below.
(Mendeleev, Newlands, Dobereiner).
a) Arranged elements into groups containing three elements each.
b) Arranged elements in a group of seven with increasing atomic masses and eighth elements with the similar properties kept below the first like eight note in an active of music.
c) Arranged elements in the increasing order of atomic mass

d-block elements are called transition elements.

Group 3-12 elements in the modern periodic table are called d-block elements.

What are groups and periods in the modern periodic table?

What are the limitations of Mendeleev's periodic table?

State any five features of modern periodic table.

List the advantages of alloys.

Write the advantages of Modern Periodic Table.