EM 10th Science - Unit - 7
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2. Which of the following is a triatomic molecule?
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4. Mass of 1 mole of Nitrogen atom is

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5. Which of the following represents 1 amu?

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7.  The volume occupied by 1 mole of a diatomic gas at S.T.P is

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9. The gram molecular mass of oxygen molecule is

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Fill in the blanks.
2.  Atoms of different elements having same number of __________are called isotones

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3. Atoms of one element can be transmuted into atoms of other element by ___________________

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4. The sum of the numbers of protons and neutrons of an atom is called its __________

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5. Relative atomic mass is otherwise known as ______________.

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6. The average atomic mass of hydrogen is _________amu

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7. If a molecule is made of similar kind of atoms, then it is called _________atomic molecule.

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8. The number of atoms present in a molecule is called its _________.                                 

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9. One mole of any gas occupies _________ml at S.T.P.

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10. Atomicity of phosphorous is ___.

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True or False
1.  Two elements sometimes can form more than one compound.
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2. Noble gases are diatomic.
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3. The gram atomic mass of an element has no unit.
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4.  1 mole of Gold and Silver contain same number of atoms.
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5.  Molar mass of CO2 is 42g. 
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