Ch 25 II

Question 1

Because metals have valence electrons that move freely, metals are also

Answer 1

Good conductors of heat and electricity

Question 2

Nonmetals are generally

Answer 2

Brittle and show little to now metallic luster

Question 3

List properties of nonmetals:

Answer 3

• High ionization energies
• High electronegativities
• Poor conductors
• Able to gain electrons easily

Question 4

Metalloids / semimetals have properties that

Answer 4

Fluctuate widely

Question 5

How are the electronegativities and ionization energies of metalloids of semimetals?

Answer 5

They lie between metals and nonmetals

Question 6

Acid-base reactions and redox reactions occur in

Answer 6

Ionic solutions

Question 7

The hydride ion is far too reactive to

Answer 7

Exist in water

Question 8

What has the largest atomic radii of all the elements in their respective periods

Answer 8

Alkali metals

Question 9

Alkali metals have metallic properties and high reactivity are due to

Answer 9

Low ionization energies

Question 10

Alkaline earth metals have both

Answer 10

Low electronegativities and positive electron affinities

Question 11

Carbon does not form ions. Rather, it participates in

Answer 11

Electron sharing

Question 12

Group VA forms covalent bonds with how many per atom?

Answer 12

Three

Question 13

Group VIA is fairly

Answer 13

Electronegative

Question 14

Halogens are highly reactive nonmetals that form which anion

Answer 14

-1

Question 15

The electronegativities of halogens are

Answer 15

Very high

Question 16

Halogens are reactive towards

Answer 16

Alkali metals and Alkaline earths

Question 17

Noble gases have what kind of boiling points?

Answer 17

Low

Question 18

Transition metals are hard elements with

Answer 18

High melting points and boiling points

Question 19

Transition metals are held loosely by the nucleus and are mobile, contributing to

Answer 19

Malleability and high conductivity

Question 20

What kind of ionization energies do transition elements have?

Answer 20

Low

Question 21

Elements in a given period have

Answer 21

The same principle quantum number

Question 22

Arrange the following in terms of increasing atomic radius:

Sr, P, Mg2+, Mg

Answer 22

Sr > Mg > P > Mg2+

Question 23

What is the electron configuration for the outermost electrons of elements in Group IVB?

Answer 23

Group IV = 4 electrons lie outside of noble gas configuration
B = Nonrepresentative, aka s and d

So, s2 d2

Question 24

The order of the elements in the periodic table is based on

Answer 24

Atomic number

Question 25

Elements within each column of the periodic table have

Answer 25

Similar valence electron configurations

Question 26

List properties of nonmetals:

Answer 26

• Brittle
• Poor conductors of heat and electricity
• Matte
• High ionization energies and electronegativities

Question 27

Why are Group 0 elements so unreactive?

Answer 27

They contain complete octets and are stable on their own

Question 28

Which group contains an element with the configuration of:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d5 5s2?

Answer 28

Since d and s: nonrep aka group B

5 + 2 = 7 electrons

Group VIIB

Question 29

Which element has the greatest electronegativity?

Answer 29

Fluorine

Question 30

The change in energy that occurs when an electron is added to an atom is known as

Answer 30

Electron affinity

Question 31

Describe metalloids:

Answer 31

• Properties lie between nonmetals and metals

Question 32

Transition metal compounds exhibit bright colors due to

Answer 32

Electrons in the partially d orbitals are easily promoted to excited states

Question 33

Describe metals:

Answer 33

• metallic
• malleable
• high melting point and densities