Test 2 Review

Molar Mass

100

What is the molar mass of (NH₄)₂SO₄

132.14 g/mol

200

What is the % by mass of Oxygen in AlPO₄?

52.4%

300

If 8.42x10²² oxygen atoms are in a sample of C₂H₃Cl₃O₂, what is the mass of the sample?

11.56 g

400

What is the mass of oxygen in a 9.24 gram sample of ammonium sulfate?

4.48 g

500

A Freon leak in the air conditioning system of an old car releases 4.09 g of CF2Cl2 per month. What mass of fluorine does this car emit into the atmosphere each year?

15.43 g F/yr

Quantum Numbers

100

The principal quantum number indicates the relative ______ of the orbital.

Size

200

Each orbital fills up with one parallel electron before a second electron of opposite spin is added to the orbital is known as what?

Hund's Rule

300

What is the l value of the highest energy electron in As?

1

400

Which of these is a correct pairing of quantum numbers

a) n=3, l=2, m_l=1.5, m_s=1/2

b) n=3, l=3, m_l=-1, m_s=1/2

c) n=4, l=3, m_l=-2, m_s=-1/2

d) n=3, l=2, m_l=0, m_s=1/4

c

500

What is the maximum amount of electrons that can share the quantum numbers n=3, m_l=0, m_s=1/2

3

Electron Configuration

100

As

[Ar]4s²3d¹⁰4p³

200

Pd

[Kr]5s²4d⁸

300

Bi

[Xe]6s²5d¹⁰4f¹⁴6p³

400

Au

[Xe]6s¹5d¹⁰

500

Write the full electron configuration for Copper

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰

Naming

100

S₂O₃

Disulfur Trioxide

200

Iron (III) Hyposulfite

Fe₂(SO)₃

300

Ag₃N

Silver Nitride

400

(NH₄)₃PO₄

Ammonium Phosphate

500

Calcium Periodate 

Ca(IO₄)₂

Periodic Trends

100

Rank Each Set in order of decreasing atomic size.

a) Br, Rb, Kr

b) Sr, Ca, Rb

a) Rb > Br > Kr

b) Rb > Sr > Ca

200

Rank the following elements in order of decreasing ionization energy.

a) Sb, Te, Sn

b) K, Ca, Rb

a) Te > Sb > Sn

b) Ca > K > Rb

300

Which element has the highest electronegativity?

Which element has the biggest atomic radius?

Fluorine: top right

Francium: bottom left

400

Element Q is in period 3 and has the following ionization energies, identify the element and write its full configuration.

IE₁      IE₂         IE₃        IE₄           IE₅        IR₆

577   1,816   2,744    11,576   14,829   18,375

Aluminum: 1s²2s²2p⁶3s²3p¹

500

Which group in the periodic table has elements with endothermic initial ionization energies and very exothermic first electron affinities?

Group 17 or halogens