CHE 2A Study Guide - Final Guide: Metric Prefix, Multiple Choice

Which one of these represents a physical change? A water, when heated, forms steam B bleach turns hair yellow C milk turns sour D apples, when exposed to air, turn brown The SI prefixes kilo and centi represent, respectively: A 10^3 and 10^2. B 10^6 and 10^-1. C 10^-3 and 10^-2. D 10^-6 and 10^2. Which of these pairs of elements would be most likely to form an ionic compound? A Ca and Br B Al and K C C and O D P and Cl Which of these scientists developed the nuclear model of the atom? A John Dalton B Aristotle C Lavoisier D E. Rutherford When alpha particles were shot at a gold foil target to probe the structure of an atom, most of the particles passed through without any deflection in path. This indicates that A matter is very dense. B the atoms of the gold were mostly empty space. C electrons have very little mass, but are charged opposite protons. D neutrons have no charge, but have a mass similar to that of a proton.

following questions; you need not show work. No partial credit will be awarded A. Which one of these represents a physical change? A water, when heated, forms steam bleach turns hair yellow milk turns sour apples, when exposed to air, turn brown B. The SI prefixes kilo and centi represent, respectively A 10 and 102 B 10 and 10 C 10and 102 D 10% and 10 C. Which of these pairs of elements would be most likely to form arn ionic compound? A Ca and Br Al and K C and O P and Cl D. Which of these scientists developed the nuclear model of the atom? A John Dalton Aristotle E. Rutherford E. When alpha particles were shot at a gold foil target to probe the structure of an atom, most of the particles passed through without any deflection in path. This indicates that A matter is very dense. B the atoms of the gold were mostly empty space. C electrons have very little mass, but are charged opposite D neutrons have no charge, but have a mass similar to that of a proton. 2. [4 pts How many significant figures are in each of the following measurements? 6.020 x 10m 0.0400 _ 3。13 pts/ Express 2200 kg as a measurement with 2 significant figures.