1. Protons of an atom give a (1)positive nuclear charge and represent the
(2) protons of an element. The number of protons of an atom is same as an
(3)atomic number of an element.
choices.
2. Neutrons of an atom hold (4)nucleus together in atomic nucleus and
contribute to a (5)_____
(6) ____
of an atom. The number of neutrons are
in isotopes of an element.
3.
Electrons give a (7)negative charge to an atom and determine the
(8)_____
property of an atom in a chemical bonding.
-
They move rapidly and constantly in their orbits, so that they are kept in
the orbits around the (9)_____. _, but not attracted into it. They provide
(10)______
energy to an atom when they are heated up to
jump up and down in the energy levels.
(Answer choices: electron / negative / protons/nucleus/atomic number /
identity / mass/ positive / electron potential / chemical / different)
