chem quiz1

Workplace Hazardous Materials Information System

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

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

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

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.

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.

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

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

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

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

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

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

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

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

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

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