|
Chemistry re-teach quiz 1. Looking at slide number 1, which list of atoms are the least reactive? A. He, Ar, Ne B. F, Cl, Br C. Zn, Cd, Hg D. C, Si, Ge 2. Looking at slide number 1, which two families are the most reactive? A. numbers 1 and 8 B. numbers 7 and 8 C. numbers 1 and 7 D. numbers 6 and 7 3. According to the law of the conservation of mass how much CaCO3 will be collected? B. 64g A. 177g C. 113g D. 241g 4. If 50 grams of sodium and 75 grams of chlorine chemically combine to form the substance sodium chloride, according to the law of the conservation of mass, the mass of sodium chloride will be ____? 2Na + Cl2 A. 125g B. 25g C. 250g D. 50g 2NaCl 5. Which subatomic particle(s) identify an element? A. atomic number B. protons C. neutrons D. sum of protons and neutrons 6. How many total atoms are in the product of the equation above? A. 3 B. 12 C. 8 D. 11 |