CHEM 120 UNIT 2 Questions with Complete
Solutions
anions are negative ions, they are named by replacing the ending of the element with -ide
followed by the word ion
Br-1=bromide ion
O2-=oxide ion
S2- = sulfide ion
ionic compounds page 10
covalent bonds sharing of electrons to give each atom an octet, nonmetal to nonmetal, DO
NOT SIMPLIFY
polyatomic ions charged particles containing 2 or more covalently bonded atoms
A substance is made of small brown particles and small white particles. When poured into water,
the substance separates - the brown particles sink and the white particles float. The original
substance would be considered a(n) mixture
, An unknown substance Z can be broken down to substances X and Y by running an electric
current through it. Substance Z is compound
Which of the following is an example of a homogeneous mixture? salt water
Which of the following elements has the symbol P? phosphorus
Which of the following elements would be classified as a nonmetal? F (#9)
The element in group I and period 3 is: Na (#11)
Which of the following elements would be classified as an alkali metal? K (#19)
Which of the following elements would be classified as a representative element? both K
(#19) and Ar (#18) are representative elements
Chlorine (#17) is a(n) halogen
Solutions
anions are negative ions, they are named by replacing the ending of the element with -ide
followed by the word ion
Br-1=bromide ion
O2-=oxide ion
S2- = sulfide ion
ionic compounds page 10
covalent bonds sharing of electrons to give each atom an octet, nonmetal to nonmetal, DO
NOT SIMPLIFY
polyatomic ions charged particles containing 2 or more covalently bonded atoms
A substance is made of small brown particles and small white particles. When poured into water,
the substance separates - the brown particles sink and the white particles float. The original
substance would be considered a(n) mixture
, An unknown substance Z can be broken down to substances X and Y by running an electric
current through it. Substance Z is compound
Which of the following is an example of a homogeneous mixture? salt water
Which of the following elements has the symbol P? phosphorus
Which of the following elements would be classified as a nonmetal? F (#9)
The element in group I and period 3 is: Na (#11)
Which of the following elements would be classified as an alkali metal? K (#19)
Which of the following elements would be classified as a representative element? both K
(#19) and Ar (#18) are representative elements
Chlorine (#17) is a(n) halogen
