CHEMISTRY 121 EXAM 1 QUESTIONS
WITH CORRECT ANSWERS!!
What are the three states of matter? - ANSWERsolid, liquid and gas
___ is the study of properties and behavior of matter. - ANSWERchemistry
___ is the physical material of the universe. It is also anything the has mass and
occupies space. - ANSWERmatter
__ is matter that is made up of one "thing" - ANSWERpure substance
__ is a mixture that doesn't have the same composition, properties, and appearance
throughout. - ANSWERheterogeneous
__ is a mixture that is uniform throughout. - ANSWERhomogeneous
Solid to a gas is - ANSWERsublimation
Gas to a solid is - ANSWERdeposition
Liquid to a solid is - ANSWERfreezing
Liquid to a gas is - ANSWERvaporization
Gas to a liquid is - ANSWERcondensation
Solid to a liquid is - ANSWERmelting
What two things make up pure substances? - ANSWERelements and compounds
(molecules)
How many known elements are there? - ANSWER118
What are most elements? - ANSWERmonatomic
What seven elements are diatomic? - ANSWERH2, F2, Cl2, I2, O2, N2, BI2,
In 1919 who lead the oil drop experiment that discovered both the charge and the
mass of an electron? - ANSWERRobert Millikan
Who proposed the plum pudding model of an atom? - ANSWERJ.J. Thomson
Who preformed the gold foil experiment? - ANSWERErnest 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. - ANSWERpositive & electrons
, Which of the following are heterogeneous? Magnesium, concrete, seawater,
milkshake. - ANSWERconcrete & milkshake
__ precipitate less soluble component and separate solid from liquid -
ANSWERfiltration
___ separate by boiling point - ANSWERdistillation
__ separate by solubility or attraction (chemical property) -
ANSWERchromatography
__ depends upon amount of sample: (mass, volume, length) - ANSWERextensive
__ does not depend on amount of sample: (color, temperature, melting point,
density) - ANSWERintensive
__ __ __ __ are determined by studying how substances change or react to make
new substances and to give off or absorb energy. - ANSWERchemical properties of
matter
__ changes in physical appearance of a substance but not its chemical composition.
- ANSWERphysical changes
transformations of substances into chemically different substances -
ANSWERchemical changes
which of the following is a physical process? rusting of iron, boiling canned soup,
dissolving of sugar in water, or burning of wood - ANSWERboiling canned soup and
dissolving of sugar in water
__ is a measure of how tightly packed the particles in a substance are. -
ANSWERdensity
Who worked with cathode ray tubes in the late 1800's that lead to the discovery of
the electron? - ANSWERJ.J. Thomson
Who discovered the proton? - ANSWERRutherford
Who discovered the neutron? - ANSWERJames Chadwick
_ is an atom that has gained or lost electrons - ANSWERion
Atoms of an element may differ in the number of neutrons is an _. - ANSWERisotope
H - 1p + 0n = __ - ANSWERhydrogen
H - 1p + 1n = __ - ANSWERdeuterium
WITH CORRECT ANSWERS!!
What are the three states of matter? - ANSWERsolid, liquid and gas
___ is the study of properties and behavior of matter. - ANSWERchemistry
___ is the physical material of the universe. It is also anything the has mass and
occupies space. - ANSWERmatter
__ is matter that is made up of one "thing" - ANSWERpure substance
__ is a mixture that doesn't have the same composition, properties, and appearance
throughout. - ANSWERheterogeneous
__ is a mixture that is uniform throughout. - ANSWERhomogeneous
Solid to a gas is - ANSWERsublimation
Gas to a solid is - ANSWERdeposition
Liquid to a solid is - ANSWERfreezing
Liquid to a gas is - ANSWERvaporization
Gas to a liquid is - ANSWERcondensation
Solid to a liquid is - ANSWERmelting
What two things make up pure substances? - ANSWERelements and compounds
(molecules)
How many known elements are there? - ANSWER118
What are most elements? - ANSWERmonatomic
What seven elements are diatomic? - ANSWERH2, F2, Cl2, I2, O2, N2, BI2,
In 1919 who lead the oil drop experiment that discovered both the charge and the
mass of an electron? - ANSWERRobert Millikan
Who proposed the plum pudding model of an atom? - ANSWERJ.J. Thomson
Who preformed the gold foil experiment? - ANSWERErnest 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. - ANSWERpositive & electrons
, Which of the following are heterogeneous? Magnesium, concrete, seawater,
milkshake. - ANSWERconcrete & milkshake
__ precipitate less soluble component and separate solid from liquid -
ANSWERfiltration
___ separate by boiling point - ANSWERdistillation
__ separate by solubility or attraction (chemical property) -
ANSWERchromatography
__ depends upon amount of sample: (mass, volume, length) - ANSWERextensive
__ does not depend on amount of sample: (color, temperature, melting point,
density) - ANSWERintensive
__ __ __ __ are determined by studying how substances change or react to make
new substances and to give off or absorb energy. - ANSWERchemical properties of
matter
__ changes in physical appearance of a substance but not its chemical composition.
- ANSWERphysical changes
transformations of substances into chemically different substances -
ANSWERchemical changes
which of the following is a physical process? rusting of iron, boiling canned soup,
dissolving of sugar in water, or burning of wood - ANSWERboiling canned soup and
dissolving of sugar in water
__ is a measure of how tightly packed the particles in a substance are. -
ANSWERdensity
Who worked with cathode ray tubes in the late 1800's that lead to the discovery of
the electron? - ANSWERJ.J. Thomson
Who discovered the proton? - ANSWERRutherford
Who discovered the neutron? - ANSWERJames Chadwick
_ is an atom that has gained or lost electrons - ANSWERion
Atoms of an element may differ in the number of neutrons is an _. - ANSWERisotope
H - 1p + 0n = __ - ANSWERhydrogen
H - 1p + 1n = __ - ANSWERdeuterium
