Worksheetschemical foundation
Total questions: 23
Worksheet time: 12mins
Mass is a measurement of
how much space an object occupies.
how dense an object is.
the amount of matter in an object.
the volume of an object.
An element is made of one type of
molecule.
atom.
compound.
mixture.
Which of the following is an intensive property of matter?
volume
mass
energy content
density
A change in a substance that does not involve a change in the identity of the substance is called a(n)
chemical change.
physical change.
extensive property.
intensive property.
If a mixture is uniform in composition, it is considered to be
heterogeneous.
molecular.
homogeneous.
elemental.
Which of the following is an extensive property of matter?
boiling point
density
volume
melting point
Which of the following changes is a chemical change of matter?
ice melting to produce water
vinegar combining with baking soda to produce carbon dioxide
water boiling to produce water vapor
liquid silica solidifying to form glass
Which of the following is an example of a heterogeneous mixture?
tap water
chunky peanut butter
orange-colored sugar water
gold ring
Which of the following is a pure substance?
air
granite
water
stainless steel
John Dalton thought that atoms
contain molecules.
cannot be broken down further.
are all composed of carbon
have no mass.
mass is neither created nor destroyed in a chemical reaction. This scientific law is called the law of
(a)
The fact that every sample of a particular chemical compound contains the same elements in exactly the same proportions by mass is known as the law of
conservation of energy.
conservation of mass.
atomic theory.
definite proportions.
If two or more compounds are composed of the same two elements, then the ratio of the masses of the second element that is combined with a certain mass of the first element is always a ratio of small whole numbers. This statement is called the law of
definite proportions.
conservation of mass.
atomic theory.
multiple proportions.
Which of the following statements of Dalton’s atomic theory describes conservation of mass?
All matter is composed of atoms.
Atoms of a given element are identical in size, mass, and other properties.
Atoms cannot be subdivided, created, or destroyed.
Atoms of different chemical elements combine in simple whole-number ratios to form chemical compounds.
Which is one way that Dalton’s atomic theory has been shown to be incorrect?
Atoms can change identity in chemical reactions.
Atoms can be split into subatomic particles.
Atoms can be destroyed by chemical reactions.
Some atoms of a particular element are identical to atoms of other elements.
Experiments with cathode rays being deflected by a magnetic field show that cathode rays are composed of particles that are
magnetic.
negatively charged.
positively charged.
neutral in charge.
Rutherford called the region that deflected alpha particles
an electron.
a positron.
a nucleus.
a quark.
The total volume of the nucleus of an atom is
very large compared with the rest of the atom.
very small compared with the rest of the atom.
about the same size as an electron.
smaller than a neutron.
Electrons can be found
inside protons
inside neutrons.
attached to the nucleus.
moving rapidly outside the nucleus.
What is the charge of a neutron?
positive
negative
neutral
None of the above
The word atom means
indivisible.
indestructible.
energetic.
charged.
Protons are bound together by
electric forces.
magnetic forces.
strong nuclear forces.
gravitational forces.
Electrons are bound together by
electric forces.
magnetic forces.
strong nuclear forces.
gravitational forces.
