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Chemistry : Atoms, Molecules, Elements and Compounds


Answer the following questions by choosing the appropriate option.

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Multiple choice

Your Performance  

1.

In a neutral atom, the number of neutrons and protons is equal.

  True

  False

 

2.

The number of electrons in a neutral atom is equal to its atomic number.

  True

  False

 

3.

Isotopes have similar chemical properties.

  True

  False

 

4.

One atom of carbon and two atoms of oxygen combine to form a molecule of carbon dioxide [CO2].

  True

  False

 

5.

Isotopes have same atomic number.

  True

  False

 

6.

Hydrogen and oxygen are combined chemically in a fixed proportion of 2:1 in the compound water.

  True

  False

 

7.

Nucleus always contains a neutron.

  True

  False

 


 
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