JOIN IN LESSON 1

Question 1

Which polyatomic ion has the most oxygen atoms?
* Bromite
* Hypobromite
* Bromate

Answer 1

• Bromate

Question 2

Chemically, what is the difference between the polymer in plastic pipes for plumbing and the polymer in plastic wrap?
* The plastic for plumbing has a metal backbone rather than carbon
* There is one additional chlorine atom per carbon
* Plastic wrap polymer is more branched

Answer 2

• There is one additional chlorine atom per carbon

Question 3

Which type of polyethylene has the most branching in the carbon backbone?
* LDPE
* HDPE
* UHMWPE

Answer 3

• LDPE

Question 4

What are the systematic names of the following compounds?
* N2O5
* PCl3
* P4O6

Answer 4

Dinitrogen pentoxide
Phosphorus trichloride
Phosphorus trioxide

Question 5

What element is most often found in a polymer backbone?
* Hydrogen
* Carbon
* Oxygen

Answer 5

• Carbon

Question 6

Which type of bonding occurs when there are distinct molecules rather than extended systems?
* Covalent bonding
* Ionic bonding
* Metallic bonding

Answer 6

• Covalent bonding

Question 7

When news stories talk about sodium in the diet, to what form of sodium are they referring?
* Sodium metal
* Sodium atoms
* Sodium ions

Answer 7

• Sodium ions

Question 8

Boron has two naturally occurring isotopes, 10 11 B and B. Based on its atomic mass, which is more abundant?
* 10B is more abundant
* 11B is more abundant
* The abundance is roughly even

Answer 8

• 11B is more abundant

Question 9

Which part of an atom is much less massive than the other parts?
* Electron
* Neutron
* Proton

Answer 9

• Electron

Question 10

Based on the periodic table, what element is most likely to form polymers like carbon?
* Boron
* Nitrogen
* Silicon

Answer 10

• Silicon

Question 11

Why do isotopes behave the same chemically?
* The number of neutrons has no effect on electrons
* They have the same mass
* Most elements have only one isotope

Answer 11

• The number of neutrons has no effect on electrons

Question 12

Which is true of a monatomic cation?
* It has more neutrons than protons
* It has more electrons than protons
* It has more protons than electrons

Answer 12

• It has more protons than electrons

Question 13

How many atoms are there in Fe(NO3 )3?
* 8
* 11
* 13
* 15

Answer 13

• 13

Question 14

Determine the names of the following ionic compounds
* Fe2O3
* Na2O
* Ca(NO3)2

Answer 14

Iron(III) oxide or ferric oxide
Sodium oxide
Calcium nitrate

Question 15

For which type of chemical bond are the bonding electrons not constrained to a localized region?
* Covalent
* Ionic
* Metallic

Answer 15

• Metallic

Question 16

Why does it make sense that the atomic number is the number of protons?
* Because it determines most of the mass
* Because it determines the number of electrons
* Because it determines the size of the nucleus

Answer 16

• Because it determines the number of electrons

Question 17

What is the name of Cl2O7? * Chloride oxide
* Dichloride oxide
* Dichlorine oxide
* Dichlorine heptoxide
* Chlorine(VII) oxide

Answer 17

• Dichlorine heptoxide

Question 18

What is the formula of vanadium (V) oxide?
* V5O
* V5O2
* V2O5

Answer 18

V2O5

Question 19

In the periodic table, what region is the home of the nonmetal elements?
* Lower left
* Upper left
* Lower right
* Upper right

Answer 19

• Upper right