ch 7 - basics of chemistry Flashcards
what has physical properties that we can see, smell, taste, and touch
a. radiation
b. matter
c. energy
d. electricity
matter
what causes oxidation
a. addition of oxygen or the loss of hydrogen
b. addition of hydrogen or the loss of oxygen
c. addition of both oxygen and hydrogen
d. loss of both oxygen and hydrogen
addition of oxygen or the loss of hydrogen
what is an ion
a. atom or molecule that carries an electrical charge
b. atom or molecule without an electrical charge
c. dust particle left over after the ionization process
d. spark discharged during the ionization process
atom or molecule that carries an electrical charge
what is an atom with a positive electrical charge
a. neutron
b. anion
c. cation
d. molecule
cation
what is an ion with a negative charge
a. anion
b. cation
c. molecule
d. neutron
anion
what does the term miscible mean
a. incapable of being mixed
b. capable of being mixed
c. incapable of being ionized
d. capable of being ionized
capable of being mixed
what is united with the aid of an emulsifier to create an emulsion
a. two or more miscible substances
b. two or more immiscible substances
c. a reduction and a solution
d. a surfactant and a liquid
two or more immiscible substances
what is a solution
a. unstable mixture of the largest particles
b. unstable mixture of an emulsion and a reduction
c. uniform mixture of two or more mutually immiscible substances
d. uniform mixture of two or more mutually miscible substances
uniform mixture of two or more mutually miscible substances
what is air
a. shell of radiation surrounding Earth
b. gaseous mixture that makes up the Earth’s atmosphere
c. common name for the chemical that makes the sky appear blue
d. water vapor that forms clouds
gaseous mixture that makes up the Earth’s atmosphere
what is true of liquid
a. it is matter with fixed volume and definite shape
b. it is matter with no fixed volume and no definite shape
c. it is matter with fixed volume but no definite shape
d. it is matter with no fixed volume but definite shape
it is matter with fixed volume but no definite shape
what is NOT true of atoms
a. all matter is composed of atoms
b. they are small particles of elements
c. all atoms are identical
d. atoms consist of smaller particles
all atoms are identical
what is true of oxygen
a. it is the most abundant element on Earth
b. it is the least abundant element on Earth
c. it should not be infested because it is poisonous to humans
d. contrary to popular belief, there is no oxygen in the air
it is the most abundant element on Earth
what is true of water
a. it is the most abundant of all substances on Earth
b. it is a relatively scarce substance
c. water comprises a very small portion of the human body
d. the human body is made entirely of water
it is the most abundant of all substances on Earth
what is true of elements
a. there are only five basic elements in the universe
b. in chemistry, the main elements are sunshine, clouds, rain, and snow
c. elements are the most complex form of matter
d. elements are the simplest form of matter
elements are the simplest form of matter
what is light a form of
a. energy
b. matter
c. gas
d. liquid
energy
what is true of each of the approximately 90 naturally occurring elements
a. though chemical properties vary, all have the same physical properties
b. though physical properties vary, all have the same chemical properties
c. all share the same physical and chemical properties
d. each has its own distinctive physical and chemical properties
each has its own distinctive physical and chemical properties
what term refers to molecules that contain two or more atoms of the same element
a. atomic molecules
b. chemical molecules
c. radiological molecules
d. elemental molecules
elemental molecules
what businesses primarily use oil-in-water emulsions
a. auto repair shops
b. bakeries
c. salons and spas
d. fast-food restaurants
salons and spas
what is true of moisturizer
a. it is an oil-in-water emulsion
b. It is a water-in-oil emulsion
c. it is an oil-in-water reduction
d. it is a water-in-oil reduction
it is an oil-in-water emulsion
what is a difference between water-in-oil (W/O) emulsions and oil-in-water (O/W) emulsions
a. O/W emulsions are greasier
b. W/O emulsions are greasier
c. O/W emulsions are not easily rinsed away with water
d. W/O emulsions are easily rinsed away with water
W/O emulsions are greasier
what are most skin care products
a. reductions of oil and water
b. emulsions of oil and water
c. solutions of oil and water
d. suspensions of oil and water
emulsions of oil and water
what term means “water-loving”
a. hydrocentric
b. hydroactive
c. hydrophobic
d. hydrophilic
hydrophilic
what term means “oil-loving”
a. lipophilic
b. lipocentric
c. lipoactive
d. lipophobic
lipophilic
how much of the air is made up of nitrogen
a. one-quarter
b. three-eights
c. two-thirds
d. four-fifths
four-fifths
