Which of the following scenarios is expected to have the smaller DQ (Desirability Quotient)? Also Explain
what could have been done to increase the DQ for your selected scenario
Scenario 1: A dental patient has one set of x-rays done each year
Scenario 2: A dentist stays in the room with each patient as x-rays are taken - Scenario 2. To increase the
DQ the dentist should leave the room or wear a lead vest
What element is Fe - iron
What element is Br - Bromine
What is the symbol for lead? - Pb
Scientific study requires which one of the following to aid in confirming a hypothesis? Choose ONE
a.) Consulting an expert
b.)Reproducible experimental evidence
c.)Random results which confirm parts of the hypothesis
d.)Observations
e.) A consensus vote of all researchers - b.) Reproducible experimental evidence
Is Table salt (NaCl) an element, compound, homogeneous solution, or heterogeneous mixture? -
Compound
Is sugar water an element, compound, homogeneous solution, or heterogeneous mixture? -
Homogeneous solution
Is cake mix an element, compound, homogeneous solution, or heterogeneous mixture? - Heterogeneous
mixture
,Place the following actions in the correct chronological order when using the Scientific Method...
a.) Gather information
b.) Propose hypothesis
c.) Identify a problem to study
d.) Perform experiments
e.) Confirm hypothesis - c,a,b,d,e
Identify each of the following as best describing Analytical, Biochemistry, Inorganic, Nuclear, Organic or
Physical Chemistry
___________ Studies ways of detecting and measuring amounts of chemicals in samples.
___________ Studies the energy of molecules and the changes molecules can undergo.
___________ Studies non-carbon based compounds.
___________ Studies chemistry in plants and animals.
___________ Studies how the center of an atom is organized. - ___________ Studies ways of detecting
and measuring amounts of chemicals in samples. (Analytical)
___________ Studies the energy of molecules and the changes molecules can undergo. (Physical)
___________ Studies non-carbon based compounds. (Inorganic)
___________ Studies chemistry in plants and animals. (Biochemistry)
___________ Studies how the center of an atom is organized. (Nuclear)
A combination of 2 or more substances that can be separated by using only a physical process is:
a.) A compound
b.) A mixture
c.) A substance
d.) A composition
e.) An Element - b.) A mixture
Which of the following is an example of a pure substance:
a.) milk
, b.) leather
c.) a piece of carpet
d.) ocean water
e.) liquid nitrogen - e.) Liquid Nitrogen
Which one is a compound?
a.) I
b.) Ni
c.) Co
d.) Rf
e.) NO - e.) NO
Identify the following as an element, compound, homogeneous solution, or heterogeneous mixture:
_________ Solid red phosphorus
_________ 2+ substances mixed at molecular level
_________ Mixture of solid and liquid that easily separates
_________ Water - _Element_ Solid red phosphorus
_Homogeneous__ 2+ substances mixed at molecular level
_Heterogeneous__ Mixture of solid and liquid that easily separates
_Compound________ Water
Symbol for Barium - Ba
Symbol for Potassium - K
Symbol for Chromium - Cr
What element is Na - Sodium
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