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