Nt1310 Unit 1

Unit 1, Activity 2, Specific Assessment Rubric

Chemistry

Blackline Masters, Chemistry Louisiana Comprehensive Curriculum, Revised 2008

Page 1

Unit 1, Activity 2, Specific Assessment Rubric

3 Measurements are to the correct number of significant figures Units included Answers are within the range of acceptable error Measurements finished within the prescribed time limit All measurements

2 2 or 3 measurements

0 Less than 2 measurements

All measurements

2 or 3 measurements

Less than 2 measurements Less than 2 measurements

All measurements

2 or 3 measurements

All measurements

2 or 3 measurements

Less than 2 measurements

Questions Answered

All safety rules followed Answered correctly

Answered
B represents atoms bonded to the central atom. B can be identical atoms or different atoms. Directions: 1. Find the other students who have the same color balloons as you. Have someone inflate a balloon as much as possible without popping it. Inflate your balloon(s) to the same size. 2. Using the patterns below, tie the appropriate number and color balloons together. For example, for the AB2E model, tie 2 blue balloons and a white balloon together. For groups of 4 balloons, it is easier to tie 2 balloons together and then the other 2 balloons together, then twist the two groups together. For five-balloon groups, make sets of 2 and 3 balloons and twist. For six balloons, use 3 sets of 2 balloons twisted together. 3. Attach a piece of string to hang the finished model from the ceiling. Type of Molecule Number of Atoms Attached to the Central Atom 2 3 3 4 3 3 5 4 3 2 6 5 4 Balloons Needed for Model 2 pink 3 blue 2 blue, 1 white 4 red 3 red, 1 white 2 red, 2 white 5 green 4 green, 1 white 3 green, 2 white 2 green, 3 white 6 yellow 5 yellow, 1 white AB4E2 4 yellow, 2 white * * * One colored balloon models for electron pair geometries * *

AB2 AB3 AB2E AB4 AB3E AB2E2 AB5 AB4E AB3E2 AB2E3 AB6