2.2 Lesson 2 - Formation of compounds

2.2 Lesson 2 - Formation of compounds

Watch video and answer the following questions

Multiple Choice

Atoms of same elements combine and form

• Molecule

• Compound

Multiple Choice

Atoms of different elements combine and form

• Molecule

• Compounds

How is a compound formed?

• lose their valence electrons

• gain more valence electrons

• share their valence electrons

Multiple Select

Compounds are formed by

• lose their valence electrons

• gain more valence electrons

• share their valence electrons

ALEF Lesson 18 Slide 3

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule

Multiple Choice

Chemical formula of Water

• CaCO3

• H2O

• CO2

Multiple Choice

Chemical formula of Carbon dioxide

• H2O

• CO2

• CaCO3

Multiple Choice

Chemical formula of Table salt

• H2O

• CO2

• NaCl

Multiple Choice

How many Hydrogen atom is there in H2O

• 1

• 2

• 3

• 4

Complete Alef Lesson 18