Metallic Bonding & Alloys

Question 1

In metals, valence e- are…

Answer 1

delocalized

Question 2

delocalized:

Answer 2

free to roam around- not belonging to any one atom

Question 3

valence e- move about in what is referred to as a …

Answer 3

sea of e-‘s

Question 4

what two vacant outer energy level orbital of metals overlap?

Answer 4

p and d oribtals

Question 5

P and d orbitals allow outer e- to:

Answer 5

move freely among the metal cations

Question 6

metallic bond:

Answer 6

chemical bonding formed as a = of the attraction btwn metal atoms and surrounding sea of e-

Question 7

properties of metals:

Answer 7

• good conductors of heat and electricity
  -malleable
  -ductile
  -strong absorbers and reflectors of light

Question 8

free e- allow for easy….

Answer 8

thermal conductivity

Question 9

When heat is applied to metals=

Answer 9

energy + , e- move more quickly

Question 10

when electricity is applied to metals=

Answer 10

e- are attracted from the - end to the + end

Question 11

malleable:

Answer 11

ability of a substance to be hammered or beaten into thin sheets

Question 12

ductile:

Answer 12

ability of a substance to be drawn or pulled through a small opening to produce wire

Question 13

Why are metals shining?

Answer 13

e- is metals are readily available to absorb photons of energy at many diff frequencies
- e- immediately emit photons and return to a lower energy level
= shiny reflective surface

Question 14

strong forces of the metallic bond =

Answer 14

high melting points of most metals

Question 15

molten metals can be poured to form…

Answer 15

metal alloys

Question 16

Metal alloys:

Answer 16

metals atoms replacing other metal atoms or smaller metal atoms occupy small spaces btwn larger atoms

Question 17

Metal Alloys types:

Answer 17

Brass, bronze, stainless steel, gold