Chapter 6: Substances (Barsam)

Draw a water molecule.

Match the following vocabulary with its definition.

• A substance formed when two or more elements are chemically bonded

• Compound

• A pure substance that cannot be broken down into simpler substances

• Mixtures

• A solid material whose constituents are arranged in a highly ordered structure

• Molecule

• A combination with not chemical reaction

• Element

• A group of atoms bonded together

• Crystal

Draw a carbon dioxide molecule.

Draw an example of crystal structures.

Molecules and crystals are the two (a)   forms matter takes. In ​ (b)   , atoms cluster together in ​ (c)   groups. In ​ (d)   lattices, the atoms arrange themselves ​ (e)   into repeating array or grid.

• basic
• small
• molecules
• crystal
• geometrically

Sort the following as being either a characteristics of Atomic Numbers or the Atomic Mass.

Groups:

(a) Atomic Number

,

(b) Atomic Mass

• element's position in the periodic table
• the top number

• protons + neutrons

• weight of the neucleus

• number of protons
• the bottom number

• atom's identity

Match the vocabulary word with its definition.

• a homogeneous mixtures of 2+ substances

• Heterogeneous Mixtures

• have distinct, separate components.

• Solvent

• have uniform compositions. looks as one.

• Solute

• being dissolved

• Solution

• doing the dissolving

• Homogeneous Mixtures

What is the chemical formula for water, and what do the letters and numbers mean?

Is a compound a pure substance or a mixture, and why?

Label the Substances Family Tree

a

b

c

d

e

f

g

h

i

j

C5(diamonds)

Cl2

Elements

MoleculesE

H2O

CrystalsE

MoleculesC

Compounds

CaCl2(calcite crystals)\

CrystalsC