Classification of the Elements

Modern periodic law is based on?

• Molar mass

• Atomic number

• Atomic weight

• Chemical bond

Alkali metals belong to which group?

• VIIB

• IA

• IIA

• IVB

Calcium is a......

• Metal

• Non metal

• Metalloids

• Inert element

Which is more reactive?

• H

• Li

• Na

• K

Write any two anomalies of Modern periodic table.

Which is more reactive?

• F

• Cl

• Br

• I

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Magnesium is ...... block elements.

• S block

• P block

• d block

• f block

How many groups are there in modern periodic table?

• 17

• 18

• 16

• 19

How many rows are there in Mendeleev periodic table?

• 7

• 8

• 9

• 6

Metals are those which ......... electrons.

• Lose

• gain

• Neutralise

• Ionises