WHMIS, Atomic Theory, Periodic Table, Ionic Nomenclature

What does the WHMIS symbol for a flame represent?

• Corrosive material

• Biohazardous material

• Flammable material

• Compressed gas

Which WHMIS symbol would indicate a substance causing serious health effects?

• Skull and crossbones

• Health hazard

• Flame

• Corrosion

What does the WHMIS symbol with an exclamation mark indicate?

• Health hazard

• Explosive

• Irritant or toxic material

• Oxidizing material

Who was the first to propose the idea of an atom as an indivisible particle?

• Dalton

• Democritus

• Bohr

• Rutherford

Which scientist proposed the "plum pudding" model of the atom?

• Bohr

• Thompson

• Rutherford

• Dalton

What discovery is Rutherford known for?

• Electrons orbit the nucleus

• The nucleus is positively charged

• Atoms are indivisible

• Neutrons exist in the nucleus

Which atomic model proposed that electrons move in fixed orbits around the nucleus?

• Dalton’s Model

• Bohr’s Model

• Electron Cloud Model

• Plum Pudding Model

What does the modern electron cloud model describe about electrons?

• Electrons are fixed in place

• Electrons move in fixed orbits

• Electrons exist in a cloud around the nucleus

• Electrons are positively charged

What do elements in the same group of the periodic table have in common?

• Same number of electron shells

• Same number of protons

• Same number of valence electrons

• Same atomic mass

What are the elements in Group 18 of the periodic table called?

• Alkali metals

• Halogens

• Noble gases

• Transition metals