SCIN131 – Week 2 Lesson Quiz (92%)Part 1 of 3 - 36.0/ 40.0 Points
Question 1 of 25 4.0/ 4.0 Points
`Isotopes of two different elements could not have
A. different number of protons.
B. the same number of neutrons
C. different number of electrons
D. different number of neutro...
scin131 – week 2 lesson quiz 92 part 1 of 3 360 400 points question 1 of 25 40 40 points isotopes of two different elements could not have a different number of protons b the s
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SCIN131 – Week 2
Lesson Quiz (92%)
Part 1 of 3 - 36.0/ 40.0 Points
Question 1 of 25 4.0/ 4.0 Points
`Isotopes of two different elements could not have
A. different number of protons.
B. the same number of neutrons
C. different number of electrons
D. different number of neutrons
E. it is possible they could have any of these
Feedback: Topic discussed in Chapter 2
Question 2 of 25 4.0/ 4.0 Points
`If a silicon atom contains 16 neutrons, what is its mass number?
A. 16
B. 14
C. 28
D. 30
E. none of the above
Feedback: See the periodic table and section 3.6
Question 3 of 25 4.0/ 4.0 Points
, A student heats 0.5585 g of iron with 0.3350 g of sulfur. She reports that she obtains 0.8792 g of iron
sulfide and recovers 0.0144 g of unreacted sulfur. Show by calculation whether or not her results obey
the law of conversation of mass.
A. No, because the number of grams of iron(II) sulfide is less than the grams of iron and sulfur that
she started with.
B. No, because there is no iron left over.
C. No, because the sum of the initial masses is 0.9135 g and the sum of the final masses is 0.9136 g.
D. Yes, because the sum of initial masses is 0.8935 g and the sum of the final masses is 0.8936 g.
E. Yes, because the percentage of iron is definitely 63.52% in the compound.
Feedback: Topic discussed in Chapter 2.
Question 4 of 25 4.0/ 4.0 Points
Which of the following elements is a metalloid?
A. B
B. Si
C. Sb
D. Te
E. all of the above
Feedback: Topic discussed in Chapter 3.6 See the periodic table.
Question 5 of 25 0.0/ 4.0 Points
Which group contains the noble gases?
A. Group 7A
B. Groups 3B through 2B
C. none of the above
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