chem quiz1

What does WHMIS mean?

Workplace Hazardous Materials Information System

John Dalton's Atomic Theory

1)All matter is made up of small, indivisible particles called atoms2)Atoms of the same element are identical in size and mass, 3)Atoms of different elements have different properties4)Different elements can combine to form new substances in specific fixed ratios. Ex: hydrogen 1, oxygen 2, H2O

JJ Thomson

discovered the electron, with the beam, plum pudding model1) All atoms are made of smaller substomatic particles, in different combinations to make different elements2) An atom was a sphere of positive charge, which electrons where embedded in to

Ernest Rutherford

discovered the nucleus using the gold foil experiment1) An atom is mostly empty space2) An atom contains a positivly charged core called the nucleu3) The nucleus contains the protons and neutrons4) Electrons move throught the rest of the atoms volume

Ernest Rutherford's Experiment

In his gold foil experiment, he released positively charged particles that he aimed at a thin sheet of gold foil. He thought that the particles would pass through the gold foil, but some of them bounced back, hitting the nucleus.

Neils Bohr

Electrons surrounded the nucleus, 1) The nucleus of an atom is composed of nucleons-protons and neutrons2) Electrons orbit the nucleus at specific energy levels, called orbitals. 3) 1st energy level holds up to 2 electrons, 2nd and 3rd holds up to 8.

Exploding Bomb Pictogram

Explosion or reactivity hazards. -keep away from heat and ignition sources.

Flame over circle pictogram

For oxidizing hazards. -keep away from heat and sources of ignition-use in weel-ventilated area

Health Hazard Pictogram

may cause or suspected of causing serious health effects-don't ingest-don't get on ski-use proper ppe-dispose of as directed

biohazardous infectious material pictogram

Organisms or toxins that can cause disease in people or animals-don't ingest or get on skin-use proper ppe-dispose of as directed-limit exposure

Gas Cylinder Pictogram

Gases under pressure-don't drop-keep away from extreme temperatures

Skull and Crossbones Pictogram

can cause dealth or toxicity with short exposure to small amounts-dont ingest, or get on skin-use proper ppe-dispose of as directed-limit exposure

Environment Pictogram

may cause damage to the aquatic environment-dispose of as directed-limit exposure

Corrosion Pictogram

Corrosive damage to metals as well as skin and eyes-don't ingest or get on skin-ppe-dispose of as directed

Flame pictogram

For fire hazards-keep away from heat and sources of ignition

Exclamation mark pictogram

may cause less serious health effects or damage the ozone layer-don't ingest or get on skin-dispose of as directed-limit exposure