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Atoms and Molecules Tenth Std Science Tnpsc Group 2 Group 4

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Atoms And Molecules

Matter is made of ____

The first scientific theory of the atom was proposed by _____

Atoms of the same element may have different____

Atoms of different elements may have same ___

____ is the smallest particle that takes part in a chemical reaction

Anything that has mass and occupies space is called ____

___ are the building blocks of matter

Atom contains subatomic particles such as_____

_____ don’t have a considerable mass

The mass of an atom is mainly contributed by its____

The sum of the number of protons and neutrons of an atom is called its ____

The mass of an atom is measured in 

Atomic mass unit is one-twelfth of the mass of a____

An isotope of carbon, which contains___

The mass of a proton or neutron is approximately____

In the beginning, the mass of ___ atom was chosen as a standard and 
masses of other atoms were compared with it.

The stable isotope of ___ with atomic mass 12 is used as the standard for measuring the relative atomic 
mass of an element

 If the atomic mass of an element is expressed in grams, it is called as ___

Gram Atomic Mass of hydrogen___

Gram Atomic Mass of carbon___
Gram Atomic Mass of nitrogen___
Gram Atomic Mass of oxygen___

The ____ of an element is the weighted average of the masses of its naturally occurring isotopes. 

Atomic mass of Hydrogen is____

Atomic mass of Helium is ____
Atomic mass of Lithium is____
Atomic mass of Beryllium is ___

Atomic mass of Boron is ____

A _____ is a combination of two or more atoms held together by strong chemical forces of attraction, i.e. chemical bonds.

If the molecule is made of similar kind of atoms,then it is called ____

The molecule that consist of atoms of different elements is called ____

In oxygen molecule, there are ___ oxygen atoms

____ contains three oxygen atoms and hence it is called homotriatomic molecule.

If a molecule contains more than three atoms, then it is called ____

____ does not exist in free state except in noble gas

_____exists in a free a state

____& are less reactive

____ does not have a chemical bond

Chemists measure atoms and molecules in____

One mole of an element contains ____ atoms

____ law states that equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules?

Molecular formula of gases can be derived using ____ law

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