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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.

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

  True

  False

 

2.

Isotopes have same atomic weight.

  True

  False

 

3.

Atomic weight of an element is the mass of an atom of that element in grams.

  True

  False

 

4.

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

  True

  False

 

5.

An element is a substance made up of different kinds of atoms.

  True

  False

 

6.

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

  True

  False

 

7.

The number of electrons in a neutral atom is equal to its atomic number.

  True

  False

 


 
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