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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.

The smallest atom is that of hydrogen.

  True

  False

 

2.

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

  True

  False

 

3.

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

  True

  False

 

4.

Electrons are present in the nucleus.

  True

  False

 

5.

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

  True

  False

 

6.

Atomic number of an element is the number of neutrons present in the nucleus of the atom.

  True

  False

 

7.

Of a proton, neutron and an electron, the electron is the lightest.

  True

  False

 

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