UNIT 2: STARTING THE INVESTIGATION

Compounds can be produced by what process?

Chemical Change

Cl

Chlorine

Pure sugar is an example of a(n):

Compound

TRUE OR FALSE: Colloidal particles will eventually settle out.

FALSE

TRUE OR FALSE: The Mohs hardness scale increases linearly from 1 to 10.

FALSE

_______________ may be defined as the resistance of a material to scratching.

Hardness

He

Helium

H

Hydrogen

Ar

Argon

Zn

Zinc

What is the correct measure of density?

g/cm3

A mixture of uneven distribution and easy separation is called ___________________.

heterogeneous

A solution which contains maximum solute at a given temperature is ________________.

saturated

Pb

Lead

Mg

Magnesium

N

Nitrogen

Can colloidal suspensions be separated out by filtration?

No

O

Oxygen

K

Potassium

All atoms of the same element have the same number of:

Protons

Ag

Silver

Na

Sodium

What are three examples of physical properties?

boiling point, hardness, ability to conduct electricity

C

carbon

Each element possesses unique ___________ and ___________ properties.

chemical; physical

The various components of a _______________ do not combine chemically.

mixture

All the _________________ have some similar physical properties.

nonmetals