chem 5 3

Which of the following correctly represents the second ionization of calcium?

a.) Ca⁺(g) → Ca²⁺(g) + e^-

b.) Ca⁺(g) + e^- → Ca²⁺ (g)

c.) Ca⁺(g) + e^- → Ca(g)

d.) Ca(g) → Ca⁺ (g) + e^-

e.) Ca^-(g) + e^- → Ca²⁺(g)

a.) Ca⁺(g) → Ca²⁺ (g) + e^-

The first ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and __________ as you go from the bottom to the top of a group in the table.

a.) are completely unpredictable

b.) increase, increase

c.) decrease, decrease

d.) increase, decrease

e.) decrease, increase

b.) increase, increase

Which of the following most likely represent the atomic radius of a Cr atom, the ionic radius of a Cr²⁺ ion, and the ionic radius of a Cr³⁺ ion?

a.) 128 pm for Cr, 167 pm for Cr²⁺, and 193 pm for Cr³⁺
b.) 128 pm for Cr, 109 pm for Cr²⁺, and 63 pm for Cr³⁺
c.) 128 pm for Cr, 89 pm for Cr²⁺, and 63 pm for Cr³⁺
d.) 128 pm for Cr, 147 pm for Cr²⁺, and 193 pm for Cr³⁺

c.) 128 pm for Cr, 89 pm for Cr²⁺, and 63 pm for Cr³⁺

Of the following, which atom has the smallest atomic radius?

 

Na

 

Se

 

K

 

S

S

Lithium belongs to the ________ group of the periodic table.

alkali metal

List the elements Cs, Ca, Ne, Na, Ar in order of decreasing first ionization energy.

a.) Ne > Ar > Na > Cs > Ca

b.) Ne > Na > Cs > Ca > Ar

c.) Ar > Ca > Cs > Na > Ne

d.) Ne > Ar > Ca > Na > Cs

d.) Ne > Ar > Ca > Na > Cs

The most common sulfur ion has a charge of __________.

2-

Which of the following is an isoelectronic series?

a.) B^5-, Sr^4-, As^3-, Te^2-
b.) F^-, Cl^-, Br^-, I^-
c.) Si^2-, P^2-, S^2-, Cl^2-
d.) S, Cl, Ar, K
e.) O^2-, F^-, Ne, Na⁺

e.) O^2-, F^-, Ne, Na⁺

Which element of group 4A has the highest melting point?

Sn

C

Pb

Si

C

Of the following, which atom has the largest atomic radius?

K

List the elements Na, Ca, Rb, Cl, He in order of decreasing first ionization energy.

He > Cl > Ca > Na > Rb

What are the common ion charges of the elements Al and Br?

+3 for Al and -1 for Br

Metallic character for the main group elements generally ________.

a.) decreases from left to right across a period and increases down a group

b.) increases from left to right across a period and increases down a group

c.) increases from left to right across a period and decreases down a group

d.) decreases from left to right across a period and decreases down a group

a.) decreases from left to right across a period and increases down a group

Bromine belongs to the ________ group of the periodic table.

a.) alkali metal
b.) alkaline earth metal
c.) noble gas
d.) halogen

d.) halogen

Gaseous elements characterized by low reactivity are found in group ________ of the periodic table.

a.) 8A
b.) 5A
c.) 7A
d.) 6A

a.) 8A

Which substance is the best conductor of electricity?

gold

Between which two elements is the difference in metallic character the greatest?

Rb and O

Which ion does not have a noble gas configuration in its ground state?

a.) Ga³⁺
b.) As^3-
c.) Sc³⁺
d.) Al³⁺

a.) Ga³⁺

The most metallic of the following elements is:

Mg
K
Al
Na
Ar

K

Sodium is much more apt to exist as a positive ion than is chlorine. This is because __________.

a.) chlorine has a greater electron affinity than sodium does
b.) chlorine is a gas and sodium is a solid
c.) chlorine is more metallic than sodium
d.) chlorine is bigger than sodium
e.) chlorine has a greater ionization energy than sodium does

e.) chlorine has a greater ionization energy than sodium does

Transition series elements are all:

metals.

Which element of group 4A has the greatest density?

a.) Sn
b.) C
c.) Pb
d.) Ge

c.) Pb

Which atom in each group (I and II) has the smallest atomic radius?

(I) Sr, Zr, I (II) N, P, As
a.) I; As
b.) I; N
c.) Sr; N
d.) Sr; As

b.) I; N

Which one of the following is not a main group element?

a.) Na
b.) Ga
c.) Fe
d.) Ba

c.) Fe

Which of the following three sets consist of atoms or ions with the same electron configuration in the ground state?

(I) O²⁺ Ne, and Mg²⁺ (II) Ni, Cu⁺, and Zn²⁺ (III) Hg, Tl⁺, and Pb²⁺

all three sets

only (I)

all but (II)

all but (I)

all but (II)

Which ionization process requires the most energy?

P3+(g) → P4+(g) + e-

Which equation correctly represents the first ionization of barium?

Ba(g) → Ba+ (g) + e-

Which horizontal row of the periodic table contains the most elements?

row 6

__________ is isoelectronic with argon and __________ is isoelectronic with neon.

a.) Cl^- , F^-
b.) F⁺, F^-
c.) Cl^- , Cl⁺
d.) Ne^-, Ar⁺

a.) Cl^- , F^-