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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.

Electrons revolve around the nucleus in shells or orbits.

  True

  False

 

2.

An atom consists of a central nucleus containing positively-charged protons and negatively-charged neutrons.

  True

  False

 

3.

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

  True

  False

 

4.

Isotopes differ in the number of neutrons they have in their nucleus.

  True

  False

 

5.

The atom is mainly empty.

  True

  False

 

6.

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

  True

  False

 

7.

The smallest atom is that of hydrogen.

  True

  False

 


 
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