NEW
Font size
WorksheetsATOMIC THEORY -1
Total questions: 10
Worksheet time: 5mins
Who discovered electron
Neils Bohr
J J Thompson
John Dalton
Demicritus
What is mass number of an atom
protons + electrons
protons alone
protons + neutrons
neutrons alone
mass number is 38 and atomic number is 18.How many protons are there?
20
21
19
18
Which is responsible for mass of an atom
only protons
only neutrons
protons + neutrons
protons + electrons
Which of the following determines atomic number of an atom
number of protons
number of neutrons
number of protons + number of electrons
number of protons + number of neutrons
An atom differs from an ion with respect to which of the following
number of protons
number of electrons
mass number
atomic number
Bohr condition for stationary orbits
mvpi = nh/2
mvr 2 pi = nh
mv/2 pi = nh
mvnh = 2 pi
Existence of nucleus was discovered by
J J Thompson
Rutherford
Bohr
Dalton
Rutherford failed to explain
existence of nucleus
existence of electrons
distribution of electrons
space in the atom
Bohrs model failed to explain
hydrogen atom
energy of electron
selection of stationary orbits
mathematical assumption to select stationary orbits
