WorksheetsB.2.1 The Nature of Matter
Total questions: 16
Worksheet time: 8mins
What particles make up atoms?
protons
isotopes
electrons
neutrons
rejectons
Smallest unit of matter that retains its unique properties:
element
compound
isotope
molecule
Created when two or more elements combine chemically in specific ratios:
element
compound
isotope
molecule
When electrons are shared between nonmetals, _____ bonds form.
ionic
covalent
hydrogen
nuclear
What happens during a chemical reaction?
bonds between atoms may be broken
new bonds between atoms may form
new substances form
new elements form
atoms may be destroyed
The particles in the nucleus of an atom:
protons
neutrons
electrons
molecules
The smallest unit of a covalent compound:
atom
element
molecule
subatomic
When electrons are transferred, __________ bonds form.
covalent
ionic
hydrogen
van der Waals
A charged atom:
molecule
isotope
ion
isomer
Which are pure substances?
elements
mixtures
solutions
compounds
light
An isotope of carbon has:
the same number of protons
a different number of protons
the same number of neutrons
a different number of neutrons
different chemical properties
An isotope may be radioactive because it has
too many electrons
an unstable nucleus
the wrong number of valence electrons
a stable octet
The number of protons in the nucleus of an atom:
atomic number
mass number
atomic mass
Avogadro's number
The number of neutrons in the nucleus of an atom:
atomic number
mass number
atomic mass
Avogadro's number
Weak attractions between molecules due to unequal sharing of electrons:
covalent bonds
ionic bonds
isotopes
van der Waals forces
The electrons involved in chemical bonding:
inner
valence
ionic
positive
