Unit 2 Chem Flashcards
What is a qualitative property?
Can be described by using the senses
What is a Quantitative property?
Can be measured and include and numerical value
What is a physical property?
Describes the general appearance of a substance
What is a Chemical property?
Describes how a substance behaves when it comes in contact with other substances
What is a particle theory of matter?
- All matter is made of tiny particles
- Each pure substance has its own kind of particle different from other substances
- Particles have a force of attraction
- Particles are always moving
- Temperature effects the speed at which particles at
What are the three states of matter?
Solid
Liquid
Gas
What is a suspension?
A term to describe a mixture that look one phased mixture but over time the solid particles settle out
How can you force a suspension?
By adding a emulsifier
What is a emulsion?
An emulsion if a mixture that overtime over time does not separate or settle out
What is a colloid?
A colloid looks a one phased mixture, but suspended don’t not settle out
How can you distinguish colloid from a homogeneous mixture?
Colloid particles are longer than particles of a homogeneous mixture
What is a pure substance?
Only one type of an atom or molecules
What is a element?
Only one type of atom
What is a compound?
2 or more different atoms
What is a mixture?
Contains two or more substances
What is homogeneous mixture?
A solution that looks like one phase
What is a heterogenous mixture?
More then one phase can be seen
Mechanical mixture
Two or more phase are very visible
What is the formula for density?
Mass over volume and density
What make up subatomic particles?
Protons
Electron
Neutron
What are protons?
Protons have + charge
Found in the necleus
What are electron?
Electrons have - charge
Found in the rings around the nucleus
What are the neutron?
Has no charge
Found in nucleus
What are the proton and electron = to?
The atomic number
What are the neutron = to?
The rounded atomic mass
What the atomic theory?
- All elements are made up of tiny particles called atoms
- atoms of given element are alike
- atoms of different elements are different
- chemical change takes takes place when atoms linkup with or separate from one another
- Atoms are not created or destroyed by chemical or physical change
What is vaporization?
Rapid change of liquid vapour into steam
What is evaporation?
Conversation of liquid to gas by adding heat
What is condensation?
The process of gas to liquid
What is Sublimation?
Transition of a gas to solid or solid to gas
What is grass?
Given Required Application Solution Statement
What are the acceptable unit?
Mass (kg, g)
Volume (mL, cm3, m3 L)
Density(g/mL, g/cm3, kg/m3, kg/L)
