Classification of matter
chemical and physical properties and changes
physical behavior of matter
gas laws
Development of the atomic theory
100

what is the difference between a compound and a mixture?

Compounds are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.

100

Chemical property

 Is any of a material's properties that becomes evident during, or after, a chemical reaction

100

What is kinetic energy (chemistry)

is the energy of motion, observable as the movement of an object or subatomic particle.

100

difference between diffusion and effusion?

Diffusion occurs when gas molecules disperse throughout a container. Effusion occurs when a gas passes through an opening that is smaller than the mean free path of the particles.

100
  1. Who was the ancient Greek philosopher that first proposed the concept of atoms?

Democritus

200

what method should be used to separate two liquids?

Distillation 

200

Physical property

Is any property that is measurable, involved in the physical system, intensity on the object's state and behavior.

200

how do kinetic energy and temperature correlate?

When the temperature of an object increases, the average kinetic energy of its particles increases.

200

The rate of effusion of a gas is inversely proportional to the square root of its molar mass.

Grahams law 

200

Which scientist proposed the law of conservation of mass?

Antoine Lavoisier

300

 A geologist finds a material that she thinks may be gold. What test would reveal that the material is not gold and not an element?

Its density is different that of gold.

300

During which of the following processes will the chemical composition of a substance change?

Decomposition 

300

List the states in decreasing order of kinetic energy.

Gas, liquid, solid

300
  1. Standard pressure is equal to __________ kPa

101.3

300

Which scientist discovered electrons using the cathode ray tube experiment?

J.J. Thomson

400

A student is given a 250-gram sample of seawater. She is asked to determine the percentage of dissolved solids in the sample. Which should she do first?

Dissolve the liquid

400

Evaporating water produces gaseous water. What has occurred during this process?

A physical change has not resulted in a new substance.

400

what relationship is produced by the close packing of molecules in a solid

decreased compressibility 

400
  1. This law says that the volume and pressure of a gas are indirectly proportional to each other. 

Boyle's law
400

The scientist who formulated the plum pudding model of the atom was?

J.J. Thomson

500

Difference between a colloid and suspension?

Unlike those in a suspension, particles in a colloid do not separate when sitting still. The particles in a suspension may be separated by filtration unlike those in a colloid.

500

During which of the following processes will the chemical composition of a substance remain unchanged?

Sublimation 

500
Physical factors of gases. 

pressure, volume, number of particles (chemists group them by moles) and temperature.

500

Under the same temperature, pressure and volume all gasses contain the same number of molecules (but not the same mass). What law?

Ideal gas law

500

The atomic theory states atoms are?

Composed of protons, neutrons and electrons.