Chemistry Unit Test Mr. Priebe-Nizar Multiple Choice Knowledge and Understanding Answer each question with the most appropriate choice. (1 mark each) 1. Which element has a density of 4.93 g/cm' a) Manganese b) Iron c) Lead d) Silver e) Selenium f) Iodine 2. Which of the following can indicate the presence of water vapour? a) Burning splint b) Glowing splint c) Limewater d) Cobalt chloride e) A precipitate f) a rubber chicken 3. Which element has a melting point of 234.32? a) Tin b) Vanadium c) Boron d) Silver e) Mercury f) Silicon 4. The physical and chemical nature of an atom is established by the... a) atomic mass d) number of protons in the nucleus b) number of electrons e) number of neutrons in the nucleus c) atomic number f) both C and D 5. Strontium is a(n)... a) alkali metal b) halogen c) alkaline earth metal d) noble gas e) metalloid f) none of the above 6. Which of the following has the largest mass? a) Proton b) Electron ) Neutron d) all of the above e) only A and C f) more information is needed 7. 5. Which of the following elements is a halogen? a) Bromine b) Krypton c) Potassium d) Magnesium e) Lead () Uranium 8. A sodium ion has... a) 1 1 protons and 10 neutrons d) 16 protons and 18 electrons b) 11 protons and 10 electrons e) 10 protons and 1 1 electrons c) 16 protons and 16 neutrons f) more information is needed 9. Which is a quantitative observation? a. The object is a white cylinder. d. The material is powdery and easily blown by the wind. b. The object is as long as my finger. e. The fruit is yellow and sweet c. The substance is a transparent liquid. f. None of these are quantitative observations 10. Which of these is a chemical property? a) toxicity b) malleability c) hardness d) ductility e) viscosity f) none of these are chemical properties