chem unit 2 exam

How many unpaired electrons are present in the ground state Xe atom?

0

How many valence electrons do the alkali metals possess?

1

Write the formula for copper (II) sulfate pentahydrate

CuSO4∙5H2O

When filling degenerate orbitals, electrons fill them singly first, with parallel spins. This is known as

Hund's rule

Place the following in order of increasing metallic character. Rb, Cs, K, Na

Na < K < Rb < Cs

Place the following elements in order of increasing atomic radius. S, Te, O

O < S < Te

Choose the ground state electron configuration for Zn^2+

[Ar]3d^10

Choose the ground state electron configuration for Cr3+

[Ar]4s^2 3d^1

Give the ground state electron configuration for Se

[Ar]4s^2 3d^10 4p^4

Give the ground state electron configuration for Sr

[Kr]5s^2

Give the ground state electron configuration for Pb

[Xe]6s^2 4f^14 5d^10 6p^2

Give the ground state electron configuration for F−

1s^2 2s^2 2p^6

How many unpaired electrons are present in the ground state N atom?

3

How many valence electrons does an atom of Tl possess?

3

How many valence shell electrons does an atom of thallium have?

3

How many valence electrons do the noble gases possess?

8

How many valence electrons does an atom of Ar possess?

8

For a particular element, identify the species that has the smallest radius. A) cation C) neutral B) anion D) radical

A

Identify the compound with covalent bonds. A) CH4 B) Ar C) LiBr D) Mg E) Nal

A

Identify the elements correctly shown by decreasing radii size. A) N^3- to N C) N to N^3- B) K+ to K D) Cu^2+ to Cu+

A

Identify the most reactive alkali metal with water. A) Cs B) K C) Rb D) Na

A

Which of the following statements is TRUE? A) An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. B) An orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. C) It is possible for two electrons in the same atom to have identical values for all four quantum numbers. D) Two electrons in the same orbital can have the same spin. E) None of the above is true.

A

Which of the following contains BOTH ionic and covalent bonds? A) BaF2 B) Cl2 C) MgSO4 D) SF6 E) None of the above contains both ionic and covalent bonds

C

Give the name for KMnO4

potassium permanganate

Identify a characteristic of halogens

powerful oxidizing agents

Give the number of core electrons for Te

46

Choose the orbital diagram that represents the ground state of N

A. one 1s and one 2s are filled completely and three 2p are only half full

Give the correct formula for aluminum sulfate

Al2(SO4)3

Electrons filling up the orbitals from low to high is known as

Aufbau principle

Choose the statement that is TRUE. A) Outer electrons efficiently shield one another from nuclear charge. B) Core electrons effectively shield outer electrons from nuclear charge. C) Valence electrons are most difficult of all electrons to remove. D) Core electrons are the easiest of all electrons to remove. E) All of the above are true.

B

Identify the alcohol in fermented drinks. A) CH3CH2CH2OH C) CH3OH B) CH3CH2OH D) (CH3)2CHOH

B

Write a balanced equation to show the reaction of sulfurous acid with lithium hydroxide to form water and lithium sulfite. A) H2SO4(aq) + LiOH(aq) → H2O(l) + Li2SO4(aq) B) H2SO3(aq) + 2 LiOH(aq) → 2 H2O(l) + Li2SO3(aq) C) HSO3(aq) + LiOH(aq) → H2O(l) + LiSO3(aq) D) HSO4(aq) + LiOH(aq) → H2O(l) + LiSO4(aq) E) H2S(aq) + 2 LiOH(aq) → 2 H2O(l) + Li2S(aq)

B

Which atom in each group (I and II) has the smallest atomic radius? (I) Ca, Ti, Br (II) O, S, Se

Br; O

Write a balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapor. A) 2 C2H6(g) + 7 O2(g) → 4 CO2(g) + 6 H2O(g) B) C2H6(g) + 5 O(g) → 2 CO(g) + 3 H2O(g) C) 2 C2H6(g) + 5 O2(g) → 4 CO(g) + 6 H2O(g) D) C2H6(g) + 7 O(g) → 2 CO2(g) + 3 H2O(g) E) 2 CH3(g) + 5 O(g) → 2 CO(g) + 3 H2O(g)

C

Write a possible molecular formula for C4H4O

C24H24O6

What is the empirical formula for C10H20O5?

C2H4O

Give a possible molecular formula for the empirical formula of C3H5ClO

C6H10Cl2O2

Identify rubbing alcohol. A) CH3CH2CH2OH C) CH3OH B) CH3CH2OH D) (CH3)2CHOH

D

Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate. A) Al(C2H3O2)2(aq) + (NH4)2PO4(aq) → AlPO4(s) + 2 NH4C2H3O2(aq) B) Al(C2H3O2)2(aq) + (NH3)2PO4(aq) → AlPO4(s) + 2 NH3C2H3O2(aq) C) Al(CO3)2(aq) + (NH3)2PO4(aq) → AlPO4(s) + 2 NH3CO3(aq) D) Al(C2H3O2)3(aq) + (NH4)3PO4(aq) → AlPO4(s) + 3 NH4C2H3O2(aq) E) Al(CO2)3(aq) + (NH4)3PO3(aq) → AlPO3(s) + 3 NH4CO2(aq)

D

Identify the FALSE statement about acid rain. A) Acid rain contains nitric acid and sulfuric acid. B) Acid rain dissolves marble statues. C) Acid rain comes from coal-powered electric power plants. D) Acid rain corrodes steel bridges. E) Acid rain comes from hydroelectric power plants.

E

Identify the compound with ionic bonds. A) Ne B) CO C) N2 D) H2O E) KCl

E

Choose the valence orbital diagram that represents the ground state of Sr2+

E. three 4p boxes are completely filled

Give the formula of sulfurous acid

H2SO3

What is the empirical formula for Hg2(NO3)2?

HgNO3

Place the following in order of decreasing metallic character: P, As, K

K > As > P

Place the following in order of increasing atomic radius. Sr, Li, Ca

Li < Ca < Sr

Electron affinity of Li

Li(g) + e− → Li^−(g)

Identify the isoelectronic elements

P^3-, S^2-, C^1-, K+, Ca^2+

No two electrons can have the same four quantum numbers is known as

Pauli exclusion principle

Electron affinity of S

S(g) + e− → S^−(g)

Identify the element that chlorine forms a covalent bond with

carbon

Give the name for H2CO3

carbonic acid

The element that corresponds to the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5 is

chromium

Give the name for CoCl2∙6H2O (Remember Co forms several ions)

cobalt(II) chloride hexahydrate

The noble gas that is used by researchers to cool down samples for analysis

helium

Describe the reaction of the noble gases with metals

inert

A cation of +2 indicates that an element has

lost 2 electrons

An element that has the valence electron configuration 5s25p5 belongs to which period and group?

period 5, group 7A

A covalent bond is best described as

sharing of electrons between atoms

Give the name for P4O10

tetraphosphorus decoxide

An ionic bond is best described as

the transfer of electrons from one atom to another

Give the name for SnO

tin (II) oxide

Write the name for Sn(SO4)2 (Remember that Sn forms several ions)

tin(IV) sulfate

Give the name for TiCO3 (Remember that titanium forms several ions)

titanium(II) carbonate

Describe the reaction of the alkali metals with non-metals

vigorous