Semester 1 Review

Metrics and Density

100

Convert 100. g to mg

0.100 mg

200

convert 2.0 cm³ to liters

0.002 L

300

what is the density of an object in kg/L, if the mass is 200 g, and the volume is 150 mL?

1.33 kg/L

400

What is the mass of an object in centigrams, if the density is 2.70 g/mL, and the volume is 5.0 cm³?

4050 cg

500

What is the volume of an object in mm³, if the density is 11.4 g/mL, and the mass is 3.0 x 10⁴ mg?

2630 mm³

Electrons

100

What is the electron configuration for sodium?

1s²2s²2p⁶3s¹  

or

[Ne] 3s¹

200

What is the electron configuration for the element Cu?

1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹

^or 

^{[Ar] 3d¹⁰ 4s¹}

300

What is the electron configuration for the ion iodide? (note: you must write the complete electron configuration)

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶

400

Draw the Lewis structure for the element Barium.  How many electrons are in each energy level for this element?  

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²

Electrons in each energy level:

2, 8, 18, 18, 8, 2

500

What is the electron configuration for the Cr²⁺ ion?  How many electrons are in each energy level?

1s²2s²2p⁶3s²3p⁶3d⁴

^{Electrons in each energy level:}

^{2, 8, 12}

Chemical Names and Formulas

100

Name the following compound:

BaS

Barium Sulfide

200

Name the following compound:

SO₃

sulfur trioxide

300

Write the formula of the following compound:

Calcium oxalate

CaC₂O₄

400

Name the following compound:

Sn(CO₃)₂

tin (IV) carbonate

500

Is the following compound ionic or covalent?

(NH₄)₃PO₄

What is the name of this compound?

Ionic; Ammonium Phosphate

Ionic Bonding

100

What is the charge of a oxygen ion?

2+

200

What is the charge of an aluminum ion?

3+

300

Name the anion in the following formula:

BaSO₄

Sulfate

400

Name 3 properties of ionic compounds

• They are usually crystalline solids.
• They have high melting points and high boiling points.
• They are usually soluble in water but insoluble in organic solvents.
• They conduct electricity when dissolved in water or when melted.

500

Name 4 properties of covalent compounds

• solids, liquids or gasses at room temperature
• Low melting points and boiling points.
• Soft or brittle solid forms.
• Poor electrical and thermal conductivity.
• Usually insoluble in water  

Periodic Trends

100

How does electronegativity change as you go across a period?

It generally increases

200

How does the atomic radius change as you go down a group?

It increases

300

How does atomic radius change as you go across a period?

it decreases

400

Explain why is the electronegativity of Neon is 0 or N/A

Neon is a noble gas which has a full valence shell and does not attract electrons under room temperature conditions

500

In the list of elements, which is most likely to lose electrons and which is most likely to gain electrons? Explain your reasoning

Fe, O, Li, N, Cl, K

K - most likely to lose electrons (lowest ionization energy)

O - most likely to gain electrons (highest electronegativity()