Chemistry Final Review Semester 1

Atoms and Matter

100

What is the charge of an electron? 

Negative 

200

Is water an element, a chemical, or a mixture? 

A chemical

300

How many centimeters are in 74 kilometers?

7,400,000

400

I have an atom with 22 protons, 24 electrons, and 15 neutrons. What is the name, charge, and atomic weight of this atom? 

Titanium, charge -2, mass 37

500

Element Q has two isotopes Q-32 (53%) and Q-35. What is the average atomic mass of Q?

33.4 amu

Electrons and Ionic Bonding

100

What is the charge of an oxygen ion? 

-2

200

Name the following compound CaI₂

Calcium Iodide

300

What is a valence electron and why is it important? 

The outermost electrons on an atom, they are involved in bonding/chemical reactions

400

Write the full electron configuration for phosphorus

1s2 2s2 2p6 3s2 3p3

500

Name the following compound Au3P2

Gold (II) Phosphide

Moles and Covalent Bonding

100

Write the formula for disulfur pentabromide

S₂Br₅

200

How many particles are in one mole?

6.02 x 10²³

300

Draw a lewis dot structure for O₂

See picture

400

How many grams of CO₂ are in 13 moles of CO₂?

572.13 grams

500

Draw a lewis dot structure for PS₂^-

See picture

Periodic Trends

100

Is calcium a metal, non-metal, or metalloid? 

Metal

200

Which of the following should have the highest electronegativity: Neon, Chlorine, or Beryllium?

Chlorine

300

What is ionization energy? 

The amount of energy required to remove one electron from an atom

400

Which of the following has a larger atomic radius: Magnesium or Calcium AND WHY? 

Calcium because it has another shell  (layer) of electrons

500

Aluminum tends to form a +3 ion. Why? 

Aluminum has 3 valence electrons, if it loses those 3, the next shell of electrons is full, so it would have 8 valence electrons. Losing 3 negative charges (electrons) gives it a +3 charge

Reactions

100

How do you usually read the arrow in a chemical reaction? 

"Yields" or "To Yield"

200

What type of reactions involves two reactants coming together to make one product? 

Synthesis

300

What type of chemical reaction is 

Fe₂O₃ + C ---> Fe + CO₂

Single displacement

400

Balance the following chemical equation 

Fe₂O₃ + C ---> Fe + CO₂

2Fe₂O₃ + 3C ---> 4Fe + 3CO₂

500

Write the following chemical equation with all states of matter and balance it: Copper metal reacts with dissolved sulfur to yield copper (I) sulfide powder

2Cu(s) + S(aq) ---> Cu₂S(s)