Elements
Compounds
Mixtures
Solutions
Colloids and suspensions

100

What is an element?
A pure substance that cannot be separated into simpler substances by physical or chemical means

100

What is a compound?
A pure substance composed of 2 or more elements that are chemically combined

100

What is a mixture?
Combination of 2 or more substances that are not chemically combined

100

What is a solution?
A mixture that appears to be a single substance

100

What is a colloid?
a mixture that has properties of both solutions and suspensions. the particles are dispersed throughout but are not heavy enough to settle out.

200

List two unique set of properties elements can be identified by
physical-boiling point, melting point, density, color, hardness chemical- reactivity with acid or oxygen, flammability

200

Compounds have properties that differ from those of the elements that form it. True or False
True

200

Solutions, suspensions and colloids are all types of mixtures. True or False
True

200

Give three examples of things that are soluble in water
salt, sugar, kool-aid

200

What is a suspension?
A mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gas. The particles are heavy so eventually they settle down.

300

What is the name of the table that lists all of the elements?
the periodic table

300

How can compounds be broken down? example- if you have NaCl, how can we separate the sodium from the chlorine?
through chemical changes. sometimes, energy is needed for a chemical change to happen

300

Describe three ways in which we can separate mixtures
distillation, centrifuge, evaporation, filtration

300

What is a solute? What is a solvent?
solute- substance that is being dissolved solvent- substance in which the solute is dissolved

300

give an example of a suspension
snow globe

400

What is the symbol of the following elements: -Oxygen -Hydrogen - Carbon -Chlorine - Aluminum
- O - H - C - Cl - Al

400

Name the elements in the following compound and state how many atoms the compound has: CaCO3
- Calcium - Carbon - Oxygen 5 atoms

400

Give an example of a mixture, a solution, a colloid and a suspension
pizza, salt and water, mayonnaise, snow globe

400

Name the solute and the solvent in lemonade: water: lemon juice: sugar:
- solvent - solute - solute

400

give three examples of a colloid
mayonnaise, shaving cream, jello, whip cream

500

Name the names of the following symbols: - Mg - Li - N - He - Ni
- Magnesium - Lithium - Nitrogen - Helium - Nickel

500

Write the chemical formula for magnesium sulfate that is made up of one atom of magnesium, one atom of sulphur and four atoms of oxygen
MgSO4

500

How can you separate a mixture of salt, pepper and pebbles?
1- use a strainer to get the pebbles 2- add water to the resulting salt and pepper 3- pass the solution through a filter and get the pepper 4- evaporate the water and get the salt

500

Which one has a higher concentration: a) 100 mL of water + 100 g of sugar b) 50 mL of water + 100 g of sugar
b

500

What is the difference between a colloid and a suspension?
The particles in a colloid are dispersed throughout but are not heavy enough to settle out. The particles in a suspension, however, are more or less evenly dispersed throughout the liquid or gas but eventually settle down