Advertisements
Advertisements
प्रश्न
Write the relation between nanometre and metre.
उत्तर
1 nanometre = 1/109 metre
or
1 nanometre = 10–9 metre
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Fill in the blank:
Atoms are _____
Fill in the blank
An ion with positive charge is called ______
Define: Chemical bond
Give two examples for each of ionic and covalent bond.
Name the three subatomic particles present in an atom.
Is it possible to see atoms these days ? Explain your answer.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Define the following term:
Atom
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
K: Potassium:: C: ______.
Define the term ions or radicals.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
The number of atoms present in a molecule is called its ______.
Lead is also known as plumbum.
The first scientific theory about atoms was given by J J. Thomson.
