Science in Action 9 Unit B 1.0-2.0

Toxic

Poisonous and infectious causing other toxic effects

Reactive Material

Corrosive Material

Compressed Gas

WHMIS

Workplace Hazardous Materials Information System

Gas to Liquid

Condensation

Solid to Gas

Sublimation

Liquid to Gas

Evaporation

Gas to Solid

Deposition

Liquid to Solid

Freezing

Solid to Liquid

Melting

Lustre

Shiny/glossy object

Malleability

Being able to shape an object without it breaking

Ductility

capable of being drawn out into wire or thread

Solubility

the amount of a substance that will dissolve in a given amount of another substance

Conductivity

how well can an object transmit and conduct electricity

Physical Change

occurs when a material changes state.

Chemical Change

when two or more substances react and create a new

substance.

Pure Substance

A substance that is only made up of one kind of matter.

Mixture

A substance that contains a combination of pure substances.

Element

Matter that cannot be broken down into any simpler substance

Compounds

Is a combination of two or more

elements in fixed proportions.

Colloids

a cloudy mixture, the particles are

so small that they cannot be filtered out easily.

Suspensions

a cloudy mixture in which tiny particles of one substance are held within another.

Solutions (Homogeneous Mixture)

Mixture that appear as one substance

Mechanical Mixture (Heterogeneous)

A Mixture where two or more substances are visible

Evidence of Chemical Change

Change in colour, change in odour, formation of a solid or gas, release or absorption of heat energy

How do you find how many protons or electrons are in each element.

Look at the atomic number, and that will tell you how many protons there are.

How to find how many neutrons are in an atom?

atomic mass-atomic number= number of neutrons

Warning

Caution

Danger

In the freeze drying method the 1st step is to.....

put it in a pressure chamber

Which symbol describes the danger of using an acid?

Matter is defined as anything that has mass and occupies...

Space

Density

Amount of madd in a given volume of a substance

Very reactive non-metals

Halogens

Have both properties of both metals and non-metals

Metalloids.

Very stable and non reactive elements

Noble gasses

Very reactive metals

Alkali Metals

Father of modern chemistry

Lavoisier

Aristotle

Matter was made up of earth, air, fire and water

J.J. Thompson model

Hantaro Nagaoka's model

Who discovered Electrons?

J.J. Thompson

Bohr's model

Dalton's model

Billiard ball model

What is the most numerous category of elements in the periodic table represent?

Metals

What does the atomic number of an atom represent?

Protons and electrons

Similar to a row of elements called a family

Groups

Families

Vertical Column of elements in the periodic table.

Peroids

Horizontal row of elements

Their reactivity is not as strong as the of the alkali metals

Alkaline-earth Metals