Click the correct answer (True or False).
Click the correct answer.
Which of the following is not a sub-atomic particle?
Electron
Proton
Neutron
Element
Which of the following statements is true for cathode rays?
They travel in a straight line.
They are produced from the anode in a discharge tube.
They consist of positively-charged particles.
They are also called canal rays.
Who suggested that electrons possess a specific amount of energy and are arranged in a succession of energy levels?
J.J. Thomson
James Chadwick
Niels Bohr
E. Rutherford
Which of the following is the positively charged central part of the atom?
Electron
Neutron
Nucleus
Ion
Click the correct answer.
Cathode rays are produced from the
in a discharge tube.
anode
cathode
diode
triode
The anode rays consist of positively charged particles called
.
protons
electrons
neutrons
crotons
revolve in fixed orbits around the nucleus.
Neutrons
Protons
Electrons
Isotopes
The sum total of
and neutrons is known as mass number of an element.
electrons
protons
nucleus
crotons
The
of an element have same atomic number.
protons
electrons
neutrons
isotopes
A
is formed when two atoms combine.
ion
electron
isotope
bond
A
bond is formed by the sharing of electrons.
covalent
ionic
strong
weak
