Scientific Notation Worksheet



Name: ______________________

Chemistry A: Review for the Final Exam

Chemistry A Final Exam review includes all test review sheets provided throughout the trimester. All answers were provided to you at that time. Please review all notes, projects, assignments, and labs to assist you in studying. Additionally, Mrs. Rathburn and Mrs. Hamilton have provided all students with tutors as requested and we have several video links found on our website

lshs-science. to assist you, as well.

Chemistry Quiz 1 Review:

1. What is the definition of chemistry?

2. Name 3 occupations that use chemistry.

3. Name and describe 3 parts of the scientific method.

4. Put the following numbers in scientific notation. Do not round your answer.:

a. 67,090 =

b. 45=

c. 0.528=

d. 0.12=

e. 0.0059=

f. 560,000=

g. 1,000,000.01=

Chemistry Test 1 Review:

Write each number in correct scientific notation.

1) 346,000 _________________

2) 780.000 _________________

3) 0.0000532 _________________

4) 0.000000249 _________________

5) 234.10 × 105 _________________

6) 19.41 × 102 _________________

7) Compare/contrast qualitative and quantitative.

8) What is the scientific method and what steps are involved?

9) What are the 7 SI base units?

10) What would be an example o a derived unit for density?

11) What is the difference between a base unit and a derived unit?

12) How do you calculate percent?

13) What are the first five elements to the periodic table? (Names, Symbols, an atomic #’s.)

14) What is the difference between precision and accuracy?

15) Provide an example of precision and accuracy

16) What is the density formula.

17) A diamond was measured to be 35g and 2.65 centimeters cubed. What is the unknown and solve for it.

18) A plastic ball has a mass of 15.8 g and a density of 0.802 g/cm3. What is the volume?

19) A metal block has a density of 2.7 g/cm3. If the volume is 1.4 L on each side, what is the mass?

20) A metal object has a mass of 450 g and a volume of 38.0 ml3. What is the unknown and solve for it

21) Why are all elements & compounds considered to be pure substances?

22) Give two examples of homogeneous mixtures.

23) Give two examples of heterogeneous mixtures.

24) Define the following

- Distillation

- Filtration

- Constant

- Variable

- Element

- compound

Chemistry Test 2 Review:

1. Draw a Bohr structure for each of the following formulas.

a. NaCl

b. COCl2

c. BaCl2

d. CH2O

In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question.

2. The charge on an ion is

a. always positive. b. always negative.

c. either positive or negative. d. zero.

3. According to the octet rule, a calcium atom has a tendency to

a. lose one electron. b. lose two electrons.

c. gain one electron. d. gain two electrons.

4. If a compound forms by ionic bonding, which is not true?

a. A positively charged atom or group of atoms attracts a negatively charged atom or group of atoms.

b. The final charge of the compound is zero.

c. The compound contains just two atoms, each of opposite charge.

d. Several ions group together in a tightly packed structure.

5. Which formula listed below represents a polyatomic ion?

a. [pic] b. H2SO4

c. Cl– d. Na+

6. To draw a Bohr structure, it is not necessary to know

a. which atoms are in the compound.

b. bond energies.

c. the number of valence electrons for each atom.

d. if the compound is ionic or molecular.

Draw Bohr structures for the following substances in the space provided.

10. nitrogen molecule, N2

11. barium oxide, BaO

12. carbon tetraiodide, CI4

13. water molecule, H2O

SHORT ANSWER

1. Write formulas for the following compounds:

a. copper (II) carbonate

b. sodium sulfate

c. ammonium phosphate

d. tin (IV) sulfide

e. nitrous acid

f. sodium hydroxide

2. Write names for the following compounds:

a. Mg(CN)2

b. CO

c. N2O5

3. How many atoms are represented by the formula Ca(HSO4)2?

In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question.

4. What follows an element’s symbol in a chemical formula to indicate the number of atoms of that element in one molecule of the compound?

a. charge sign b. superscripted number

c. number in parentheses d. subscripted number

5. The chemical formula for an ionic compound represents one

a. formula unit. b. ion.

c. molecule. d. cation.

6. What is the correct notation for a calcium ion whose outer shell is a full octet?

a. Ca1+ b. Ca2+

c. Ca1( d. Ca2(

7. What is the correct formula for copper (II) cyanide?

a. CuCN b. CuCN2

c. Cu(CN)2 d. Cu2CN

8. What is the correct name for the compound P2Cl4.

a. phosphorus chloride b. phosphorus tetrachloride

c. diphosphorus chloride d. diphosphorus tetrachloride

9. What is the correct formula for the compound made of magnesium ions and nitrogen ions?

a. Mg2N3 b. Mg3N2

c. MgN2 d. MgN

10. What is the correct name for the compound Ni2O3?

a. nickel (II) oxide b. dinickel trioxide

c. nickel trioxide d. nickel (III) oxide

11. What is the correct formula for the compound platinum (VI) fluoride?

a. PtF3 b. PtF6

c. Pt6F2 d. Pt6F

12. Changing a subscript in a correctly written chemical formula will

a. change the electron configuration of that element.

b. change the charges on the other ions in the compound.

c. change the formula so that it no longer represents the same compound.

d. have no effect on the formula.

13. The first part of the name of a ionic compound is the

a. metal. b. polyatomic ion.

c. oxyanion. d. anion.

Chemistry 2-3 Test Review:

Directions: H2O, K2O, NaCl, Si2O3, and Fe2O3 For each compound do the follow:

1. Write a chemical equation that shows the formation of your compound.

2. Identify the type of chemical reaction it is.

3. Identify the type of bond it is.

4. Draw a Bohr model of the compound.

5. Clearly label what is happening to the electrons in each compound.

6. Name the compound.

Chemistry Review Chemical Reactions

**Chemical Reactions: Study the Chemical Reaction sheet from Wednesday 11/13/13.

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