ACELLUS GENERAL CHEMISTRY

Convert 7.77×10^-4 to standard notation

0.000777

Which of the following is the correct way to express 3.7×10^-3 in standard form?

0.0037

Considering it's electron configuration, how many valence electrons are in Cs (Cesium)? 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 5s2 5p6 6s1

1

How many valence electrons are in Na (sodium)?

1

How many bonds does fluorine (group V||) form?

1 bond

How many bonds does nitrogen (group I) form? A. 1 B. 2

1 bond

A triple bond is made up of ? sigma bond(s) and ? pi bond(s).

1 sigma, 2 pi

Based on it's group number, what ion charged state does Br (bromine) form?

1-

Convert to standard notation 1.325×10^0

1.325

Express 142 in scientific notation

1.42×10²

Express the answer in scientific notation. 2.600x10^-5 x 6.100x10^-5

1.586x10^-9

Perform the following operation and express the answer in scientific notation. 1.248x10^-2 ÷ 7.8x10^-7

1.6x10^8 (?)

Perform the following operation. Express your answer in scientific notation. 1.55×10^3 x 1.20×10^3

1.86×106

Based on the electron configuration of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the compound. Lithium 1s2 2s1 Chlorine 1s2 2s2 2p6 3s2 3p5

1:1

Based on the lewis/electron dot representation of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the compound. AI∘∘∘ I◦◦◦◦◦◦

1:3

What is the electron configuration for aluminum (atomic number = 13) ?

1s2 2s2 2p6 3s2 3p1

What is the electron configuration for chlorine (atomic number = 17) ?

1s2 2s2 2p6 3s2 3p5

Considering it's electron configuration, how many valence electrons are in Ca (calcium)? 1s2 2s2 2p6 3s2 3p6 4s2

2

How many bonds does oxygen (group VI) form? A. 6 B. 2

2 bonds

A single covalent bond contains (blank) electron(s) that is/are shared between the two atoms.

2 electrons

Based on it's group number, what ion charged state does Mg (magnesium) form?

2+

Based on its group number, what ion charged state does S (sulfur) form?

2-

Express the answer in scientific notation. 8.20x10^-2 x 2.50x10^6

2.05x10^5

Express the answer in scientific notation. 2.8x10^-6 ÷ 1.4x10^-2

2x10^-4

How many valence electrons are in Ga (gallium)?

3

Remember that it takes 2 electrons to from a bond. How many bonds does CIO3-, the chlorate ion have?

3

How many bonds does nitrogen (group V) form?

3 bonds

Based on it's group number, what ion charged state does Al (aluminum) form?

3+

Which of the following is the correct way to express 3.4×10^5 in standard form?

340,000

Based on the Lewis/electron dot representation of the two atoms, predict the ratio if metal cationic (+) atom and to nonmetal anionic (-) atom in the compound. •Ca• •P::

3:2

Perform the following operation and express the answer in scientific notation. 9x10^2 ÷ 3x10^12

3x10^-10

How many bonds does carbon (group IV) form?

4 bonds

Remember that it takes 2 electrons to form a bond. How many bonds does silicon tetrachloride, SiCI4, have?

4 bonds.

Express the answer in scientific notation. 3.8x10^-5 ÷ 8.1x10^3

4.6913580246914x10^-9

How many valence electrons are in P (phosphorus)?

5

Perform the following operation and express the answer in scientific notation. 9.25×10^ - 8×6.40×10^3

5.92×10-^4

Convert to standard notation 5.74×10^8

574,000,000

To find S, the number kf shared electrons, recall that S = N - A What is S for CIO3-, the chlorate ion?

6

A triple bond contains ? shared electrons.

6 electrons

How many valence electrons are in Br (bromine)?

7

Perform the following operation and express the answer in scientific notation. 7.296×10^2 ÷ 9.6×10^-9

7.6×10^-?

Express the answer in scientific notation. 7.0x10^3 x 1.1x10^7

7.7x10^10

To find A, the number of shared electrons, recall that S = N - A What is S for silicon tetrachloride, SiCI4?

8

Perform the following operation. Express your answer in scientific notation. 4.731x10^-7 ÷ 5.7x10^3

8.3×10^-11

Perform the following operation. Express your answer in scientific notation. 3.120×10^ - 7×3.075×10^4

9.594×10^-3

Which bond is the longest? A. A B. B C. C

A

To draw a Lewis structure for a polyatomic ion, begin by calculating A, the available electrons, and N, the needed electrons. What is A for CIO3-, the chlorate ion?

A= 26 N= 32

To draw a Lewis structure for a covalent compound, begin by calculating A, the available electrons, and N, the needed electrons. What is A for silicon tetrachloride, SiCI4?

A= 32 N= 40

What is the correct formula that would result from the combination of the two ionic species? BS 2+ and N 3-

Ba3N2

What is the correct formula that would result from the combination of the two ionic species? Ba2+ and N3-

Ba3N2

What is the name of an aqueous solution of the following molecule? HBrO3

Bromic Acid

Considering the electron configuration for CI (chlorine), what ion charged state would it form? 1s2 2s2 2p6 3s2 3p5

CI1-

What is the correct formula that would result from the combination of the two ionic species? Ca2+ and O2-

CaO

Name the following compound: CaCl2

Calcium Chloride

What is the name of the binary molecular compound? CO

Carbon Monoxide

Name the following compound: CuF2 Hint: Cu has both a 1+ and 2+ form

Copper (||) Flouride

A ? bond forms when two no metals share electrons.

Covalent

What kind of bond can form between two elements when neither one of them is willing to give up their electrons but they are willing to share them?

Covalent

Considering the electron configuration for Cs (Cesium), what ion charged state would it form? 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 5s2 5p6 6s1

Cs1+

What is the formula for copper (I) nitrate? A. CuNO3 B. Cu2NO3

CuNO3

What is the name of the following binary molecular compound? N2F4

Dinitrogen Tetrafluoride

Carbon, a Group lV element, can form a single, double, triple, and quadruple bonds. True or False.

False

Oxygen, a Group VI element, can form single, double, and triple bonds.

False

What is the formula for iron (|||) Chloride?

FeCl3

What js the formula for the binary molecular compound dihydrogen monoxide?

H2O

A period represents a ? in the periodic table.

Horizontal row

What is the name of an aqueous solution of the following molecule? HBr

Hydrobromic acid

What is the name of an aqueous solution of the following molecule? HCI

Hydrochloric Acid

What is the name of an aqueous solution if the following molecule? HIO3

Iodic Acid

What is the formula for Lithium Oxide?

Li2O

What is the correct formula that would result from the combination of the two ionic species? Li 1+ and PO3 -4

Li3PO4

The bond length of the C-CI bond is ? that if the C-H bond.

Longer than

What is the correct formula that would result from the combination of the two ionic species? Mg2+ and Br1-

MgBr2

Consider the following ionic compounds and determine which has the higher melting point. A. NaBr B. KBr

NaBr

Consider the following ionic compounds and determine which has the higher melting point.

NaCI

What is the correct formula that would result from the combination of the two ionic species? Na1+ and I1-

NaI

What is the correct formula that would result from the combination of the two ionic species? Na1+ and I1-

NaI

What is the name of an aqueous solution if the molecule? HNO3

Nitric Acid

What is the name of the following binary molecular compound? NF3

Nitrogen Trifluoride

Considering the electron configuration for O (oxygen), what ion charged state would it form? 1s2 2s2 2p4

O2-

What is the name of the following binary molecular compound? PBr3

Phosphorus Tribromide

The bind that forms from the side-to-side overlap of orbitals of two atoms is termed a ? bond.

Pi

Name the following compound: K3PO4

Potassium Phosphate

What is the formula for the binary molecular compound disulfur decafluoride?

S2F10

The bond of the F-F bond is ? that of the I-I bond.

Shorter than

Name the following compound: NaCIO3

Sodium Chlorate

The bond strength if a H-F bond is (?) that of a HI bond.

Stronger than

What is the name of an aqueous solution of the following molecule? H2SO3

Sulfurous Acid

Nitrogen, a Group V element, can form a single, double, and triple bonds.

True

While ionic compounds in the solid state do not conduct electricity, when they are melted, electric current (?)

Will Flow

While ionic compounds in the solid state do not conduct electricity, when those that are water soluble are dissolved in water, electric current ?.

Will Flow

How many bonds does argon (group V|||) form?

Zero bonds

Name the following compound: Zn(CN)2 Hint: Zn only has a 2+ form

Zinc Cyanide

What is the noble gas configuration for sodium (atomic number = 11) ?

[NE] 3s1

What type of bond involves sharing of electrons?

covalent

Which orbital diagram represents nitrogen (atomic number = 7)?

↑↓1s ↑↓2s ↑↑↑2p

Which orbital diagram represents fluorine (atomic number = 9) ?

↑↓1s ↑↓2s ↑↓↑↓↑2p

Which orbital diagram represents helium (atomic number = 2) ?

↑↓1s↑↓2s ?

What is the correct formula that would result from the combination of the two ionic species? NH4 1+ and CO3 2-

(NH4)2CO3

A student measured the gran weight of a metal object to be 7.45g. According to the supplier the object weighs 6.78g. what is the error in the student's measurement?

+0.67