11b

Question 1

the temperature at which a substance changes between the solid and liquid states is called

Answer 1

melting point

Question 2

the direct change in state from the solid to the gaseous state

Answer 2

sublimation

Question 3

__occurs when a substance changes directly from a gas to a solid

Answer 3

deposition

Question 4

what are the 7 basic crystals?

Answer 4

1- cubic
2- tetragonal
3- rhombohedral
4- triclinic
5- monoclinic
6- hexagonal
7- orthorhombic

Question 5

a __ crystal not only has particles at each of the corners, but it also has one in the center (body) of the crystal

Answer 5

body-centered

Question 6

elements or compounds that can form more than one type of crystal lattice

Answer 6

polymorphous

Question 7

the __ of a crystal is the energy released when gaseous particles from crystals

Answer 7

lattice energy

Question 8

A solid in which the particles occur in random positions with no orderly pattern. Examples include asphalt and paraffin.

Answer 8

amorphous solid

Question 9

A liquid cooled so fast that its particles may not have had time to form a preferred crystalline pattern. Therefore, the molecules are locked in random positions. It is a type of amorphous solid.

Answer 9

supercooled liquid

Question 10

An extensive three-dimensional structure that represents the regular pattern of atoms or ions

Answer 10

crystal lattice

Question 11

The basic building block for any type of crystal; the section of a crystal lattice that contains one formula unit of the compound or one repeating segment of the overall lattice structure.

Answer 11

unit cell

Question 12

A state of matter in which the particles have relatively little energy, cannot overcome the attractive forces, and remain in fixed positions with set distances between them. It has a fixed volume and is relatively incompressible.

Answer 12

solid

Question 13

One of two or more forms of a polymorphous element that exists in the same physical state.

Answer 13

allotropes