Onstudy SCH3U Unit 1 Practice Test

Onstudy SCH3U

Unit 1 Practice Test

Unit 1 Practice Test ? Matter, Chemical Trends, and Chemical Bonding

Section A ? Multiple Choice (K/U, 15 marks)

1. Who proposed that electrons exist in specific energy levels?

a. Bohr

d. Rutherford

b. Dalton

e. Schr?dinger

c. Thomson

2. The nucleus of an atom consist of which particles?

a. protons

d. protons and neutrons

b. neurons and electrons

e. electron, protons and

c. electrons and protons

neutrons

3. Isotopes of carbon have the same number of ___________ but different

number of ____________.

a. neutrons, protons

d. protons, electrons

b. protons, neutrons

e. neutrons, electrons

c. electrons, protons

4.

Which statements are true about the atom of element

39 19

X

?

I. The element is yttrium

II. The element has 39 protons

III. The element has 20 neutrons

IV. The element has 19 electrons

a. I and II b. II and III c. III and IV

d. I, II, and IV e. I, II, III, and IV

5. What are the vertical columns on the periodic table called?

a. Blocks

d. Actinoids

b. Groups

e. Lanthanoids

c. Periods

Onstudy SCH3U

Unit 1 Practice Test

6. Using the table below, determine the average atomic mass of magnesium.

Isotope Mg - 24 Mg - 25 Mg - 26

Atomic mass ( 23.99 24.99 25.98

Natural abundance (%) 79% 10% 11%

a. 23. 99 b. 24.31 c. 24.98

d. 25.98 e. 74.96

7. What is the relationship between the size of an atom and the electronegativity? a. atom size increases, electronegativity is the same b. atom size increases, electronegativity increases c. atom size decreases, electronegativity increases d. atom size decreases, electronegativity decreases e. no relationship

8. Which element will form an ionic bond with a halogen?

I. an alkali metal

II. another halogen

III. an alkaline earth metal

a. I

d. II and III

b. I and II

e. I, II, and III

c. I and III

9. Which are examples of molecular compounds? I. Water, H2O II. Fluorine gas, F2

III. Nitrogen dioxide, NO2 a. I b. I and II c. I and III

d. II and III e. I, II, and III

Onstudy SCH3U

Unit 1 Practice Test

10. The Lewis structure (dot diagram) represents an atom with

a. two protons. b. two lone pairs of electrons. c. two paired valence electrons. d. two bonding pairs of electrons. e. two unpaired valence electrons

11. Which diagram represents a polyatomic ion?

12. The electronegativity of potassium is 0.8 and the electronegativity of chlorine is 3.2. What type of bond exists between these atoms? a. mostly ionic b. polar covalent c. non-polar covalent d. slightly polar covalent e. none of the above

Onstudy SCH3U

Unit 1 Practice Test

13. Which statement about ionization energy is false?

a. Ionization energy is the amount of energy required to remove the outermost electron from an atom or ion in the gaseous state.

b. The ionization energies of Group 1 elements are greater than the ionization energy of the elements in any other group

c. The second ionization energy of a given element is larger than the first ionization energy.

d. The ionization energies of Group 18 elements are greater than the ionization of energies of the elements in any other group.

e. Within a period, the ionization energy is largest for atoms or ions that have a filled outer shell.

14. Which compound is an oxoacid?

a. HCl b. HBr c. H2O

d. H2CO3 e. NaOH

15. Which of the following statements about non-metals is false?

a. Group 15 elements are all non-metals. b. The halogens are non-metals. c. The most common elements (C,N,O) in living tissues are non-metals. d. Non-metals are on the right end of the periodic table. e. There are fewer non-metals than there are metals...

Onstudy SCH3U

Unit 1 Practice Test

Section B ? Fill in the blank / Matching Questions - (T/I, 14 marks: C, 8 marks)

16. Complete the following table by filling in either the missing chemical formula or name. (14 marks)

CHEMICAL FORMULA

CCl4 GaI3 FeS

Li2SO4

CHEMICAL NAME Molecular Compounds

Diphosphorus pentoxide

Binary Ionic Compounds rubidium selenide

gold (III) oxide

Cobalt (II) bromide Compounds with Polyatomic Ions

ammonium hydroxide

magnesium phosphate potassium chlorite

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