Practice Test: Chapters 1-2

Matching skip

Short Answer skip

1. Phlogiston
   
2. Acids
   
3. covalent bonds
   
4. Weight
   
5. polyatomic ions
   

Multiple Choice skip

1. kilo (k)
   1. Law of multiple proportions, atomic theory, atomic masses
   2. 1000
   3. First "chemist." Relationship between pressure and volume. End of Greek 4 system. ideas about chemical elements
   4. individual bonds shown, may not indicate actual shape of molecule. line = individual bonds. to show shape: dotted lines behind plane of paper, wedges in front of plane of paper
   5. Fire, earth, air, water
2. Sig fig calculations: Multiply or divide
   1. 1. Collect data (observations) 2. Formulate hypothesis (suggest possible explanations) 3. Test hypothesis (do experiments)
   2. Shows dynamics, tests pressures, made up of different densities
   3. Number of sig figs same as least precise measurement (limiting term)
   4. sharing electrons
   5. 1. first element in formula named first. 2. 2nd element named as anion (-ide) 3. prefixes denote numbers of atoms present. 4. mono never used for naming first element
3. Robert Boyle
   1. Rutherford. Center = positive charge (Nucleus) with electrons moving arorund nucleus at large distance relative to nuclear radius
   2. visibly distinguishable parts, can be usually separated into 2 or more homogeneous parts
   3. First "chemist." Relationship between pressure and volume. End of Greek 4 system. ideas about chemical elements
   4. homogeneous mixture
   5. Definite volume, no specific shape
4. mass number
   1. porous paper and drop of mixture
   2. Solid wax sinks in liquid wax -- more dense
   3. 10^-15
   4. number of protons + neutrons, in superscript
   5. Use only the first number to the right of the last sig fig, don't round until the end.
5. groups/families
   1. certain molecules that contain free H+ ions. One of more H+ attatched to an anion
   2. efficient conductors of heat and electricity. malleable (into thin sheets). ductile (into wires). lustrous appearance. majority of elements.
   3. 1. Each element is made up of tiny particles called atoms. 2. Atoms of a given element are identical. Atoms of different elements are different in some fundamental way or ways. 3. Chemical compounds are formed when atoms of different elements combine with each other. compounds always the same relative numbers and types of atoms. 4. Chemical reactions involve reorganization of atoms. Changes the way they are bound together. Atoms themselves are not changed.
   4. one electron stripped off. positive ion.
   5. vertical columns, similar chemical properties

True or False skip

1. chemical formula
   symbols for elements to indicate types of atoms present. subscripts = number of atoms.

   True   False

2. metals
   efficient conductors of heat and electricity. malleable (into thin sheets). ductile (into wires). lustrous appearance. majority of elements.

   True   False

3. alkaline earth metals
   Group 2A, 2+ charged ions

   True   False

4. Rules for counting sig figs: captive zeros
   Remain the same regardless of who makes the measurements

   True   False

5. Precision
   no

   True   False