SCI 155 Chap 9a: Question Preview (ID: 9111)


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Carbon dioxide is an example of a(n)
a) heterogeneous mixture b) homogeneous mixture c) compound d) element
Sugar water is an example of a(n)
a) heterogeneous mixture b) homogeneous mixture c) compound d) element
Melting is a * change and rusting is a * change.
a) chemical, physical b) physical, chemical c) d)
Elements are made of * and compounds are made of *.
a) molecules, atoms b) atoms, molecules c) d)
In a chemical equation, products are on the * and reactants are on the *.
a) left, right b) right, left c) d)
How many valence electrons does a phosphorus atom have?
a) 3 b) 5 c) 8 d) 15
What type of bonding occurs when atoms transfer electrons?
a) covalent b) hydrogen c) ionic d) metallic
Will sulfur gain or lose electrons to achieve an octet?
a) gain b) lose c) d)
How many electrons are involved when boron forms an ion?
a) 1 b) 2 c) 3 d) 5
What charge does the calcium ion have?
a) +1 b) +2 c) -2 d) -1
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