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

  True

  False

 

2.

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

  True

  False

 

3.

Isotopes have similar chemical properties.

  True

  False

 

4.

Isotopes have same atomic weight.

  True

  False

 

5.

Isotopes have same atomic number.

  True

  False

 

6.

Nucleus always contains a neutron.

  True

  False

 

7.

Atoms are electrically neutral.

  True

  False

 


 
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