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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 of an atom has almost the entire weight of the atom and it consists of protons and neutrons.

  True

  False

 

2.

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

  True

  False

 

3.

Neutrons are negatively-charged.

  True

  False

 

4.

Atoms are electrically neutral.

  True

  False

 

5.

Isotopes have similar chemical properties.

  True

  False

 

6.

Since an atom of the element sodium contains 11 protons and 12 neutrons, its atomic number is 23.

  True

  False

 

7.

Nucleus always contains a neutron.

  True

  False

 


 
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