Homework for Unit 1 1. Determine the number of protons, neutrons and electrons for each of the following nuclear symbols: Nuclear Symbol Electrons Neutrons Protons 15 15 16 31p 18 15 33p 15 50 68 48 118Sn2+ 16 16 18 3252. 22Na* 10 28Sit+ 14 14 T0 2. List all of the ipns in the problem above. Sn,S. Ja. Si 3. What word describes the relationship between 31P and 33P? 4. Write the nuclear symbol that corresponds to each listed number of protons, neutrons and electrons. Nuclear Symbol Protons Neutrons Electrons 1 1 1 1 1 40 Ca "Br 20 20 18 35 46 36 Fe 26 29 24 14 14 14

Question 2, B, C, D, And E

A. Characteristics of Elements, Compounds, and Mixtures 1. Complete the table: Color Luster Element Physical State iron sulfur mercury magnesium

McGraw Hil ALEKS CHEMISTRY-Gener... esc E ! 1 MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements Explanation -1 gml1 Q A 1 A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 1.500 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 96.6 g. She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 97.7 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant…

3. Which process can separate a mixture of finely powdered iron and wheat flour? A. distillation 3. B. filtration C. using a magnet D. sieving E. sublimation

None