Term 1 Review B (Chemistry)

Atomic Notation & Bohr Diagrams

100

Draw the Bohr diagram for Carbon.

Answers vary.

200

Identify the element with the atomic number 27 and write its atomic notation. 

Cobalt

300

Atomic Notation on the board. 

Answers vary. 

400

Determine the number of protons, neutrons, and electrons in Cl-35.

P: 17

N: 18

E: 17

500

Why is the atomic mass shown on the Periodic Table a decimal?

The atomic mass on the PT is a weighted average of all isotopes of that element found in nature. 

Electron Configuration & Orbitals

100

What is an orbital? 

A 3D shape of where up to two electrons will dwell around the nucleus. Can be in the shape of a sphere, a dumbbell, or more complex. 

200

How many electrons can fit in the p subshell?

6

300

What is the electron configuration for Oxygen?

1s²2s²2p⁴

400

Write the full and noble gas electron configurations for Nickel.

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸

[Ar] 3d⁸ 4s²

500

How many electrons are in the n=3 energy level?

18

Ions

100

Define ion, cation, and anion.

Ion: Atom with a charge

Cation: Positively charged atom

Anion: Negatively charged atom

200

What is the ionic charge of oxygen?

-2

300

What type of structure do ionic compounds typically form in a solid state? 

Lattice structure

400

Explain (or draw out) how ionic bonds form using the elements sodium and chlorine as an example. 

One electron from sodium is transferred to the chlorine atom, so that both have a full valence shell. The sodium takes on a positive charge, while the chlorine takes on a negative charge. Because of the differences in charge, they form a bond. 

500

Explain how we came up with the ionic charge for the groups on the Periodic Table. 

Atoms form ions based on the number of electrons in the valence shell. They seek to have a total of 8 and take the most "convenient" path to make that happen (whether it be losing or gaining electrons). Changing the # of electrons causes a change in charge. 

Ionic Compounds

100

Give 2 properties of ionic compounds. 

High melting point, high boiling point, brittle. 

200

Name this compound: NaS

Sodium sulfide

300

Write the chemical formula for magnesium phosphide. 

Mg₃P₂

400

Name this compound: Fe(NO₃)₃

Iron (III) Nitrate

500

What is the chemical formula when Aluminum (III) and Sulfate bond?

Al₂(SO4)₃

Covalent Bonds & Polarity

100

What is a covalent bond?

A covalent bond occurs when two atoms share electrons to satisfy both of their octets. 

200

How many lone pairs of electrons does H₂O have?

2

300

Which is more electronegative: Nitrogen or Oxygen?

Oxygen

400

Is carbon dioxide a polar or nonpolar molecule? Why?

Nonpolar. Although it contains polar bonds, the geometry is symmetrical and therefore there is no "polarization" on the molecular level. The electronegative tendencies "cancel out". 

500

Draw the Lewis structure for C₂H₆S

Answers vary.