Isobars

Question 1 What are isobars? Question 2 Give example? Isobars Isobars are the atoms of different elements having different atomic number but same mass number. For Ex:  

Isotopes

Question 1 What are isotopes? Question 2 Give examples of isotopes? Question 3 Give few application of isotopes? Question 4 why isotopes have same chemical properties? Question 5 Why isotopes have different physical properties? Isotopes Isotopes are atoms of same element having same atomic number but different mass numbers. For Ex: 1)Isotopes of Hydrogen 1H1…

valency

Question 1 Define atomic number? Question 2 Define mass number? Question 3 Define valency? Question 4 What are valence electrons? Question 5 What are noble gases? Question 6 An element has atomic number 12.How many electrons are present in K,L,M shell? Question 7 Write the distribution of electrons in an atom of element whose atomic…

Arrangement of electrons in the atoms

Arrangement of electrons in the atoms 1)The energy levels of electrons are denoted by the numbers 1,2,3,4… and shells are represented by K,L,M,N….. 2)The arrangement of electrons in various energy levels or shells of an atom is known as electronic configuration of the element. The maximum number of electrons which can be accommodated in any…

Bohr’s model of an atom

Question 1 Describe Bohr’s model of an atom? Question 2 How did Neil Bohr’s explain the stability of atom? Question 3 Why is an atom neutral inspite of the presence of charged particle in it? Bohr’s Model Of An Atom 1)An atom is made up of three particles:electrons,protons and neutrons.Electrons have negative charge,protons have positive…

Rutherford model of an atom

Question 1 Name the particle used by Rutherford in his experiment to determine the structure of an atom? Question 2 Explain the Rutherford’s scattering experiment? Question 3 What observation were made by Rutherford’s in his experiment? Question 4 Give the postulates of Rutherford’s model of an atom? Question 5 State one drawback of Rutherford’s model of an…

J.J. Thomson model of an atom

Question 1 Describe Thomson’s model of an atom? Question 2 Which subatomic particle was not present in Thomson’s model of an atom? Question 3 Why Thomson’s model is called as Plum pudding model of an atom? Structure of an atom Dalton atomic theory suggested that atoms are indivisible(could not be broken into smaller particles) But the…

Discovery of neutron

Question 1 Name the scientist who discovered neutrons? Question 2 Which subatomic particle is not present in an ordinary hydrogen atom? Question 3 What is a neutron? Question 4 What is the charge and mass of an electron? Question 5 State the location of neutrons in an atom? Discovery of neutron After the discovery of…

Discovery of proton

Question 1 Name the positively charged particles present in the atoms of all elements? Question 2 What is a proton? Question 3 State relative mass and charge of a proton? Question 4 Name the scientist who discovered proton? Question 5 Name the gas which produces anode rays consisting of proton in the discharge tube experiment?…

Discovery of electron

Question 1 Name the scientist who discovered electrons? Question 2 What are cathode rays? Question 3 what is the nature of charge on cathode rays? Question 4 What is an electron? Question 5 What is the absolute mass and charge of an electron? Question 6 Explain the experimental set for discovery of electron? Discovery of…

Structure of an atom

Question 1 Name the building blocks of matter? Question 2 Name the subatomic particles in atoms? Question 3 Give an example to show that there are charged particle in matter? Structure of an atom Atoms and molecules are the building blocks of matter. Atoms are made up of three subatomic particles:electrons,protons,neutrons. Electrons are negatively charged,protons…