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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.

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

  True

  False

 

2.

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

  True

  False

 

3.

Isotopes have similar chemical properties.

  True

  False

 

4.

In a neutral atom, the number of neutrons and protons is equal.

  True

  False

 

5.

Nucleus always contains a neutron.

  True

  False

 

6.

Isotopes have same atomic number.

  True

  False

 

7.

Isotopes have same atomic weight.

  True

  False

 


 
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