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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

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1.

Isotopes have same atomic number.

  True

  False

 

2.

The nucleus consists of protons and neutrons and is negatively-charged.

  True

  False

 

3.

Isotopes have similar chemical properties.

  True

  False

 

4.

Nucleus always contains a neutron.

  True

  False

 

5.

Atomic weight of an element is the mass of an atom of that element in grams.

  True

  False

 

6.

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

  True

  False

 

7.

The smallest atom is that of hydrogen.

  True

  False

 


 
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