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WorksheetsATOMIC STRUCTURE
Total questions: 20
Worksheet time: 10mins
Which of the following is an electrically neutral particle?
electron
neutron
proton
alpha particle
Which one of the following scientist put forth the atomic theory of matter
Goldstein
Thompson
John dalton
Rutherford
The outermost shell of an atom is known as
Nucleus
Valence shell
bound shell
penultimate shell
If the atomic number of an element is 17 and mass number is 35 then the number of neutrons are
35
17
18
52
The number of electrons in an atom is equal to number of
nucleons in a neutral atom
neutrons in a neutral atom
protons in a neutral atom
none of the above
Which of the following ions has attained octet?
Na1+
O2-
Cl1-
All of these
The only inert gas which have a complete duplet is
Neon
Helium
Argon
Krypton
The sheet of which metal was used in Rutherford's alpha particle scattering experiment
Aluminium
Silver
Gold
Zinc
The valency of which element is zero
Silver
Hydrogen
Gold
Neon
Which of the following is not the correct conclusion from Rutherford's scattering experiment
Nucleus is small but heavy
Nucleus always carries positive charge
Atom is nearly105 times heavier than the size of the nucleus
The number of alpha particles hitting the nucleus is very large
Which of the following correctly represent the electronic configuration of Mg atom
3,8,1
8,2,2
2,8,2
1,8,3
Which of the following statement is always correct?
An atom has equal no: of protons and electrons
An atom has equal no: of neutrons and electrons
An atom has equal no: of protons and neutrons
None of above
The charged particles are called
Molecules
Atom
Ions
None of above
The elements which have same chemical properties but different physical properties are called
Isobar
Isotopes
Neutrino
Positron
Nucleus was discovered by
Goldstein
James Chadwick
Rutherford
John Dalton
Which of the following statement about electron is incorrect
It is negatively charged particle
The mass of electron is equal to mass of neutron
It is a basic constituents of all atom
It is located in orbit
An atom of an element has 3 electrons in its 3rd orbit, then its electronic configuration is
2,8,8
2,8,3
2,3,8
3,2,8
Rutherford alpha particles scattering experiment resulted in the discovery of
Electron
Proton
Nucleus
Atomic mass
No: of protons in the nucleus of an atom is called
Atomic Number
Atomic mass
Isotope
Electronic configuration
The element which has 2 valence electron
H
H1+
H1-
None of the above
