Advertisements
Advertisements
प्रश्न
Fill in the blank
An ion with positive charge is called ______
Advertisements
उत्तर
An ion with positive charge is called cation.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Write the names of the elements present in the:-
Sodium hydroxide
Define: Covalent bond
Give two examples for each of ionic and covalent bond.
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
How is the size of an atom indicated ?
Name the unit in which the radius of an atom is usually expressed.
Is it possible to see atoms these days ? Explain your answer.
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Define the following term with an example.
Element
The volume occupied by 4.4 g of CO2 at S.T.P ______
Atoms of one element can be transmuted into atoms of other elements by ______
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
The first scientific theory about atoms was given by J J. Thomson.
