CHEMISTRY 121 EXAM 1 QUESTIONS
& ACCURATE PASSED ANSWERS
RATED 100% COMPLETE
What are the three states of matter? - Correct Answer ✔✔ solid, liquid and gas
___ is the study of properties and behavior of matter. - Correct Answer ✔✔ chemistry
___ is the physical material of the universe. It is also anything the has mass and
occupies space. - Correct Answer ✔✔ matter
__ is matter that is made up of one "thing" - Correct Answer ✔✔ pure substance
__ is a mixture that doesn't have the same composition, properties, and appearance
throughout. - Correct Answer ✔✔ heterogeneous
__ is a mixture that is uniform throughout. - Correct Answer ✔✔ homogeneous
Solid to a gas is - Correct Answer ✔✔ sublimation
Gas to a solid is - Correct Answer ✔✔ deposition
Liquid to a solid is - Correct Answer ✔✔ freezing
Liquid to a gas is - Correct Answer ✔✔ vaporization
Gas to a liquid is - Correct Answer ✔✔ condensation
Solid to a liquid is - Correct Answer ✔✔ melting
What two things make up pure substances? - Correct Answer ✔✔ elements and
compounds (molecules)
How many known elements are there? - Correct Answer ✔✔ 118
What are most elements? - Correct Answer ✔✔ monatomic
What seven elements are diatomic? - Correct Answer ✔✔ H2, F2, Cl2, I2, O2, N2, BI2,
Which of the following are heterogeneous? Magnesium, concrete, seawater, milkshake.
- Correct Answer ✔✔ concrete & milkshake
, __ precipitate less soluble component and separate solid from liquid - Correct Answer
✔✔ filtration
___ separate by boiling point - Correct Answer ✔✔ distillation
__ separate by solubility or attraction (chemical property) - Correct Answer ✔✔
chromatography
__ depends upon amount of sample: (mass, volume, length) - Correct Answer ✔✔
extensive
__ does not depend on amount of sample: (color, temperature, melting point, density) -
Correct Answer ✔✔ intensive
__ __ __ __ are determined by studying how substances change or react to make new
substances and to give off or absorb energy. - Correct Answer ✔✔ chemical properties
of matter
__ changes in physical appearance of a substance but not its chemical composition. -
Correct Answer ✔✔ physical changes
transformations of substances into chemically different substances - Correct Answer
✔✔ chemical changes
which of the following is a physical process? rusting of iron, boiling canned soup,
dissolving of sugar in water, or burning of wood - Correct Answer ✔✔ boiling canned
soup and dissolving of sugar in water
__ is a measure of how tightly packed the particles in a substance are. - Correct Answer
✔✔ density
Who worked with cathode ray tubes in the late 1800's that lead to the discovery of the
electron? - Correct Answer ✔✔ J.J. Thomson
In 1919 who lead the oil drop experiment that discovered both the charge and the mass
of an electron? - Correct Answer ✔✔ Robert Millikan
Who proposed the plum pudding model of an atom? - Correct Answer ✔✔ J.J.
Thomson
Who preformed the gold foil experiment? - Correct Answer ✔✔ Ernest Rutherford
The atom has a dense center of _ charge (the nucleus) with _ moving around it at a
distance that is large relative to the nuclear radius. - Correct Answer ✔✔ positive &
electrons
& ACCURATE PASSED ANSWERS
RATED 100% COMPLETE
What are the three states of matter? - Correct Answer ✔✔ solid, liquid and gas
___ is the study of properties and behavior of matter. - Correct Answer ✔✔ chemistry
___ is the physical material of the universe. It is also anything the has mass and
occupies space. - Correct Answer ✔✔ matter
__ is matter that is made up of one "thing" - Correct Answer ✔✔ pure substance
__ is a mixture that doesn't have the same composition, properties, and appearance
throughout. - Correct Answer ✔✔ heterogeneous
__ is a mixture that is uniform throughout. - Correct Answer ✔✔ homogeneous
Solid to a gas is - Correct Answer ✔✔ sublimation
Gas to a solid is - Correct Answer ✔✔ deposition
Liquid to a solid is - Correct Answer ✔✔ freezing
Liquid to a gas is - Correct Answer ✔✔ vaporization
Gas to a liquid is - Correct Answer ✔✔ condensation
Solid to a liquid is - Correct Answer ✔✔ melting
What two things make up pure substances? - Correct Answer ✔✔ elements and
compounds (molecules)
How many known elements are there? - Correct Answer ✔✔ 118
What are most elements? - Correct Answer ✔✔ monatomic
What seven elements are diatomic? - Correct Answer ✔✔ H2, F2, Cl2, I2, O2, N2, BI2,
Which of the following are heterogeneous? Magnesium, concrete, seawater, milkshake.
- Correct Answer ✔✔ concrete & milkshake
, __ precipitate less soluble component and separate solid from liquid - Correct Answer
✔✔ filtration
___ separate by boiling point - Correct Answer ✔✔ distillation
__ separate by solubility or attraction (chemical property) - Correct Answer ✔✔
chromatography
__ depends upon amount of sample: (mass, volume, length) - Correct Answer ✔✔
extensive
__ does not depend on amount of sample: (color, temperature, melting point, density) -
Correct Answer ✔✔ intensive
__ __ __ __ are determined by studying how substances change or react to make new
substances and to give off or absorb energy. - Correct Answer ✔✔ chemical properties
of matter
__ changes in physical appearance of a substance but not its chemical composition. -
Correct Answer ✔✔ physical changes
transformations of substances into chemically different substances - Correct Answer
✔✔ chemical changes
which of the following is a physical process? rusting of iron, boiling canned soup,
dissolving of sugar in water, or burning of wood - Correct Answer ✔✔ boiling canned
soup and dissolving of sugar in water
__ is a measure of how tightly packed the particles in a substance are. - Correct Answer
✔✔ density
Who worked with cathode ray tubes in the late 1800's that lead to the discovery of the
electron? - Correct Answer ✔✔ J.J. Thomson
In 1919 who lead the oil drop experiment that discovered both the charge and the mass
of an electron? - Correct Answer ✔✔ Robert Millikan
Who proposed the plum pudding model of an atom? - Correct Answer ✔✔ J.J.
Thomson
Who preformed the gold foil experiment? - Correct Answer ✔✔ Ernest Rutherford
The atom has a dense center of _ charge (the nucleus) with _ moving around it at a
distance that is large relative to the nuclear radius. - Correct Answer ✔✔ positive &
electrons
