UNIT 1CHEMISTRY

(CHAPTER 1-3)

Complete the follow questions

There are quizzes provided towards the end of the booklet

Name:Date:

1

Goal • Use this periodic table to learn about the elements.

2

Goal • Use this ion chart to help you write the names and formulas of polyatomic ions.

3

Goal • Check your knowledge and understanding of the periodic table.

What to DoThe left-hand column in the chart below contains statements about various elements. Write the name and symbol for the element each statement refers to. If you need help, use the periodic table on page 54 of BC Science 9.

Description of Element Name of Element

Symbol

It is the only gas in group 1.

This inert gas is in period 3.

There is no heavier member of group 2.

This element is the lightest of the halogens.

Group 16 contains this reactive non-metal gas.

The atomic mass of this metal is about 56.

Period 6 contains this group 2 metal.

This is the only liquid halogen.

This metallic element is liquid at room temperature.

Photosynthesis produces this element.

This is the lightest element in period 2.

4

Goal • Choose an element. Draw it’s Bohr Model below:

5

Goal • Review your understanding of Bohr model diagrams.What to DoAnswer the following questions.Questions1. In the spaces provided, draw Bohr model diagrams for the five named

elements.

2. Complete the Bohr model diagrams for the elements in Group 1 (alkali metals) shown below.

3. In what ways are the Bohr model diagrams for the alkali metals similar?________________________________________________________________________________________________________________________________________________________________________________________________________

4. Examine the rows of the periodic table. As the rows increase, what happens to the number of electron shells?______________________________________________________________________________________________________________________________________

5. How many electrons are there in the outer shell of a sulphur(S) atom? ___________________6. How many electron shells would you expect to find in a sulphur atom? __________________7. Identify the elements whose Bohr model diagrams are shown below. Write the names of the elements in the spaces provided.

(a) _______ (b) _______ (c) _______ (d) _______ (e) _______ (f) _______

6

Goal • Review Bohr model diagrams for the first 18 elements.

7

8

Goal • Complete a concept map to demonstrate your knowledge of how atoms form

bonds.

What to DoUse the following words to complete the concept map. You can use each term more than once. You will not need to use every term.atoms, attract, covalent bond, ionic bond, ions, metal atom, non-metal atom, opposite charges, repel, share electrons, transfer electrons

9

Goal • Practice your skills and knowledge related to ionic bonding.

Questions1. Use the words from the list to fill in the blanks in the paragraph below.

attract, charge, electron, ionic bond, negative, negatively charged, opposite, positive, positively charged, transferred,

(a)When an atom gains or loses a(n) ________________, an ion is formed. All ions have a(n) ________________.

(b)Metals tend to form ________________ ions. Non-metals tend to form __________ ions.

(c)When a metal atom reacts with a non-metal atom, one or more electrons are ________________, which results in the formation of ions. One of these ions will be ________________ and one will be ________________. Because of these ______________ charges, the ions ________________ each other, forming a(n) ________________.

2. (a)Draw a model Bohr diagram for lithium in the space provided.

(b) What process or change would turn this lithium atom into an ion?___________________________________________________

(c) Would the ion that it forms be positively or negatively charged? Explain.___________________________________________________

___________________________________________________

3. (a)Draw a Bohr model diagram for fluorine in the space provided.(b) What process or change would turn this fluorine atom

into an ion?___________________________________________________

(c) Would this ion be positively charged or negatively charged? Explain.___________________________________________________

___________________________________________________

4. Lithium and fluorine react to form lithium fluoride. Draw a diagram on the back of this page to show how these two atoms would react.

10

11

Goal • Practice drawing bonding diagrams for covalent compounds.

What to DoThe drawing at right represents a covalent compound.Study this diagram then answer the following questions.

Analyze1. What does the small circle (A) represent?

___________________________________________2. What does the larger circle (B) represent?

__________________________________________3. What does the dash (C) represent?

________________________________________________4. The large circles overlap. What does this represent?

___________________________________________________________________

___________________________________________________________________

5. Why are there four dashes inside the overlapped area? ________________________________

6. How many electrons are in the outer shell of the oxygen atom on the left?________________

7. How many electrons are in the oxygen atom on the right? _____________________________

8. Explain how a covalent bond differs from an ionic bond.___________________________________________________________________

___________________________________________________________________

9. Draw diagrams to show how each of the covalent compounds below is formed by covalent bonding.

12

Goal • Demonstrate your knowledge of ionic bonding.

What to DoShow your knowledge of ionic bonding by answering the following questions in the spaces provided.Questions1. Examine the Bohr model diagrams below. Circle the atoms that are stable.

(a) (b) (c) (d) (e)

2. The following Bohr model diagram represents an oxygen atom. Examine the diagram, then answer the following questions.

(a)Why is this not a stable electron arrangement?________________________________________________________________

(b)What would make this atom stable?_________________________________________________________________

(c)Use a coloured pencil to adjust the diagram so that it shows a stable electron arrangement.

(d)Label the charge on this newly formed ion.

13

3. Draw a Bohr model diagram to show how an ionic bond would form between sodium (Na) and chlorine (Cl).

4. Define the term “ionic bond.”___________________________________________________________________

___________________________________________________________________

Goal • Practise writing the names and formulas of ionic compounds with multiple ion

charges.

What to DoWhen the metal has a multiple ion charge, a Roman numeral indicates its charge. Complete the following chart.

IonsIons

(optional)

Formula Name

Number of

Atoms in

Formula

iron(II) bromide

Fe2+ Br

FeBr2 iron(II) bromide

3

iron(II) bromide

Fe3+ Br

FeBr3 iron(III) bromide

4

copper(I) nitride

gold(III) chloride

nickel(III) bromide

14

Charge Roman Numeral

1+ I

2+ II

3+ III

4+ IV

5+ V

6+ VI

7+ VII

manganese(IV) sulphide

uranium(VI) iodide

15

Goal • Practice writing the names and formulas of polyatomic ions.

What to Do1. Complete the chart. You can use an ion chart to help you find the names

and formulas of polyatomic ions.

Ions Formula Name Number of Atoms in Formula

Na+ SO42 Na2SO4 sodium sulphate 7

NH4+ SO42 (NH4)2SO4 ammonium sulphate

15

Cu2+ NO3

Ag+ ClO3

Al3+ CN

U5+ SO32

Au3+ PO43

K+ CrO42

Na+ Cr2O72

2. Complete the chart. You can use an ion chart to help you find the names 16

and formulas of polyatomic ions.

Ions Ions (optional) Formula

Name

Number of Atoms

ammoniumpermanganate

NH4+ MnO4 NH4MnO4ammonium

permanganate 10

gold(III)hydrogen sulphide

Au3+ HS Au(HS)3gold(III) hydrogen

sulphide 7

cobalt(II) phosphate

sodiumnitrate

calciumnitrite

magnesium acetate

potassium carbonate

uranium(VI) hydroxide

lithiumnitrite

17

Goal • Check your understanding of Chapter 2.

Chapter 2 QuizCircle the letter of the best answer. 1. Approximately how many elements have been discovered?

A. threeB. 35C. 100D. 300

 2. Name two metals that are not silver coloured. A. sulphur and chlorineB. copper and goldC. copper and chlorineD. sulphur and gold

 3. Which of the following is a metalloid?A. sodiumB. sulphurC. siliconD. strontium

 4. What is a period in the Periodic Table?A. a vertical column B. a horizontal rowC. a family of elements with similar propertiesD. a group of elements all of which have the same number of valence electrons

 5. What do the noble gases He and Kr have in common?A. The same number of electronsB. The same number of valence electronsC. Filled valence energy levelsD. Both gases will make a balloon tend to float.

 6. How is the periodic table arranged?A. by atomic mass and chemical propertiesB. by ion charge and atomic massC. by ion charge and atomic numberD. by atomic number and chemical properties

18

 7. Which family of elements contains a solid, a liquid, and a gas at room temperature?A. Group 1B. Group 2C. Group 17D. Group 18

 8. Which phrase is correct for a Bohr model of a metal ion?A. more protons than electronsB. more electrons than protonsC. equal numbers of protons and electronsD. equal number of neutrons and protons

 9. Which best describes the alkaline earth metal family?A. family of metals that is magneticB. family of metals used to make coinsC. the most reactive family of metalsD. family whose elements have two valence electrons

10. Which best describes an element?A. a pure substance that cannot be broken down or separated into simpler substancesB. a pure substance that can be decomposed further by physical meansC. a mixture of different kinds of atoms, with different numbers of protonsD. a family of substances all of which have different but similar properties

Match the Term on the left with the best Descriptor on the right.Each Descriptor may be used only once.

Term Descriptor

_____ 11.atomic mass_____ 12.noble gases _____ 13.atomic number_____ 14.Bohr model_____ 15.metalloid_____ 16.alkali metal

A. a family of chemically reactive elementsB. the number of protons in an atomC. contain the element fluorineD. has properties of both metals and non-

metalsE. compares the inside of an atom to a raisin

19

bunF. the mass of an average atom of an elementG. family of chemically unreactive gasesH. shows the arrangement of electrons in an

atom

Short Answer Questions

18. Calcium is atomic number is 20.(a) Draw a simple Bohr diagram showing the number of electrons in each

energy level of a calcium atom.

(b) Draw a simple Bohr diagram showing the number of electrons in each energy level of a calcium ion, Ca2+.

19. List four properties of alkali metal elements that distinguish them (make them different) from iron. ____________________________________________________________________________________________________________________________________

20. (a) What is a valence electron? ______________________________________________________________________________________________________________________________

(b) How are valence electrons related to chemical families? ______________________________________________________________________________________________________________________________

(c) Do non-metals tend to gain electrons or lose electrons as they form ions? ______________________________________________________________________________________________________________________________

20

Goal • Check your understanding of Chapter 3.

Chapter 3 QuizNote: A periodic table and an ion chart are required for this quiz.Circle the letter of the best answer.

 1. Which of the following is an ionic compound?A. P4B. PCl3C. P4O10D. Na3PO4

 2. Which of the following is a compound?

I. CO32

II. CO2

III. HCO3

IV. O2

A. II only B. I and III onlyC. II and IV onlyD. I, II, and III only

 3. Consider the following formula: Na2CO3.What is the ratio of positive to negative ions represented by this formula?A. 2:3B. 2:1C. 3:2 D. 2:1:3

 4. What is the formula for aluminum hydroxide?A. AlOHB. AlOH3C. Al3(OH)D. Al(OH)3

21

 5. Which terms correctly describe CH3COO ?

I. ion

II. multivalent

III. polyatomic

IV. compound

A. I and IIB. III and IVC. II and IVD. I and III

 6. What is the name of the metal ion in Fe2S3?A. ironB. iron(II)C. iron(III)D. sulphide

 7. What is the name of Na2CO3?A. sodium carbonateB. sodium carbon oxideC. sodium carbideD. sodium carbon oxygen

 8. What is the name of PbS2?A. lead sulphideB. lead(II) sulphideC. lead(IV) sulphideD. lead(II) sulphate

 9. How many atoms in total are represented by the formula (NH4)3PO4?A. 11B. 13C. 17D. 20

10. An explosive device is used to blast rock for the construction of a new highway. Which set of terms describes the explosive device?A. physical change and endothermicB. physical change and exothermic

22

C. chemical change and endothermicD. chemical change and exothermic

Match the Term on the left with the best Descriptor on the right.Each Descriptor may be used only once.

Term Descriptor

_____ 11. ionic lattice_____ 12. reactant_____ 13. molecule_____ 14. ionic compound_____ 15. multivalent metal_____ 16. polyatomic ion

A. refers to metal and a non-metal chemically bonded

B. highly ordered array of ionsC. non-metal that has a negative chargeD. ion made of several atoms joined

together by covalent bondsE. may form a positive ion in more than

one wayF. a group of atoms joined by covalent

bondsG. material that is made during a

chemical reactionH. the starting material in a chemical

reactionShort Answer Questions

18. Write the formula:(a)magnesium nitride _________________(b)nickel(III) fluoride _________________(c)ammonium sulphate _________________

19. Write the name:(a)Sr3P2 __________________________________(b)V2O5 __________________________________(c)Cs2Cr2O7 __________________________________

20. What is the difference between a chemical change and a physical change?__________________________________________________________________

__________________________________________________________________

23