structure of matter class 7

What is the smallest part of an element? Give the correct answerS.

• atom

• molecule

• compound

• matter

Which Indian mathematician first suggested that all matter is made up of small particles?

• Aryabhatta

• Kanada

• Kabir

• Bhadrinath

Which of the below elements is a noble gas?

• Oxygen

• Calcium

• Magnesium

• Berillium

the symbol is potassium is?

• P

• PO

• K

• KL

Which of the following is true?

• The constituents of compounds are mixed in a fixed proportion.

• The constituents of compounds are mixed in any proportion.

• The constituents of compounds are not mixed.

• The constituents of compounds are mixed in a fixed proportion physically.

cuprum is the latin name of which element

?

• carbon

• chlorine

• coxica

• copper

What is the latin name of sodium?

• namium

• nanitrium

• natrium

• natirum

What is the valency of the group so4

• 4

• 1

• 2

• 3

how should we write sodium chloride?(the numbers are actually subscript)

• SoCl

• Na1Cl1

• So1Cl1

• NaCl

How many electrons can the shell K hold?

• 2

• 6

• 8

• 10