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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 atom is mainly empty.

  True

  False

 

2.

The elements are arranged in order of decreasing atomic numbers in a table called the periodic table.

  True

  False

 

3.

Atomic number of an element is the number of neutrons present in the nucleus of the atom.

  True

  False

 

4.

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

  True

  False

 

5.

The smallest atom is that of hydrogen.

  True

  False

 

6.

Isotopes have same atomic number.

  True

  False

 

7.

Neutrons are negatively-charged.

  True

  False

 


 
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