Physical Science Unit 04 Exam Review

Ionic Compounds

100

Is Magnesium an anion or a cation?

Cation (+) *gives away electrons

200

In Iron (II) sulfate, what is the oxidation number of Iron (Fe)?

+2

300

What is the molecular formula of Magnesium sulfate?

MgSO₄

400

Is Rb₃As a stable (neutral) molecule?

Yes

500

What is the written name for Pb(NO₃)₂? 

(Don't forget the roman numeral!)

Lead (II) nitrate

Covalent Compounds

100

What do we use to define how many of each element is in a covalent compound?

Latin subscripts (mono, di, tri, tetra, penta...)

200

What is the molecular formula of trihydrogen pentoxide?

H₃O₅

300

What is the written name for SiS₄?

Silicon tetrasulfide

400

What is the molecular formula of Triphosphorous pentanitride?

P₃N₅

500

What would the fancy (scientific) name for water be? (H₂0)

Dihydrogen monoxide

Periodic Table Numbers

100

How many electrons does Titanium (Ti) have?

22 electrons

200

What is the oxidation number of Bromine (Br)?

-1

300

Which group on the periodic table can have either a positive or negative oxidation number?

Group 14

400

What is the overall charge of an oxygen atom with 10 electrons?

-2 (2 extra electrons)

500

Which of the noble gases does NOT have 8 valence electrons? Why? (2 part question)

Helium, because it only has a total of 2 electrons and the first orbital shell can only hold 2 so its outer shell is full and stable.

Types of Bonds

100

What type of bond SHARES electrons?

Covalent Bond

200

What type of bond is HCl?

Covalent Bond

300

What type of bond consists of positively charged metal cations in a lattice structure with electrons freely flowing through them?

Metallic Bond

400

How do you use oxidation numbers to determine molecular formulas in ionic compounds?

Determine Oxidation numbers, adjust subscripts of each element/polyatomic ion to ensure they add up to a neutral 0 (example: +1 and -1)

500

Describe why water has the special characteristics that it does. What type of bonding is responsible for this?

Hydrogen Bonding - Elaborate (Teacher's Choice)

Miscellaneous

100

How many valence electrons does Barium (Ba) have?

2 valence electrons

200

Which group on the periodic table already has full valence shells and are very unreactive?

Noble Gases

300

Draw the Lewis Dot Structure of Silicon (Si)

(Answer on Whiteboard)

400

Draw the Lewis Dot structure of the compound Lithium chloride (LiCl)

(Answer on Whiteboard)

500

What type of reaction always has the products of water (H₂0) and carbon dioxide (C0₂)?

Combustion Reaction