SNC 1WC Classification of Matter and Periodic Table Practice Test PDF

## SNC 1WC Classification of Matter and Periodic Table Practice Test ### True/False (20mks) Indicate whether the statement is true or false. 1. A pure substance contains more than one type of particle. **F** 2. Electrons have a negative charge. **T** 3. Neutrons are found in orbitals surrounding...

## SNC 1WC Classification of Matter and Periodic Table Practice Test ### True/False (20mks) Indicate whether the statement is true or false. 1. A pure substance contains more than one type of particle. **F** 2. Electrons have a negative charge. **T** 3. Neutrons are found in orbitals surrounding the nucleus of an atom. **F** 4. The rows on the periodic table are called periods. **T** 5. A homogeneous mixture is a mixture with 2 or more visible phases or portions (we can see more than one substance in it). **F** 6. The alkali metals are located in the first column on the left of the periodic table. **T** 7. An element cannot be broken down further by chemical means. **T** 8. A compound contains 2 or more different elements in a fixed proportion. **T** 9. A compound is a pure substance. **F** 10. The mass number of an atom is the sum of the protons and neutrons present. **T** 11. Elements can be distinguished from each other based on their number of protons. **T** 12. Metals, such as nickel, are good conductors of heat and electricity. **T** 13. Valence electrons are found in the outmost energy level of an element. **T** 14. Noble gases are the most stable, since they do not normally react. **T** 15. The atomic number of an atom represents the number of neutrons in the nucleus. **F** 16. Elements in Period 1 of the periodic table have only one electron shell. **T** 17. The reactivity of alkali metals decreases as you move down the column. **F** 18. The reactivity of the halogens decreases as you move down the column. **T** 19. Every nucleus contains at least one proton and at least one neutron. **T** 20. The Bohr-Rutherford diagram for carbon has two energy levels. **T** ### Modified True/False (5mks) Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 1. Mixtures are made of one type of particle. **F** * **Pure Substance** 2. An element is made of one type of atom. **T** 3. H₂O is an example of an element. **F** * **a compound** 4. Metals are found on the left side of the periodic table. **T** 5. The first shell of an atom can hold eight electrons. **F** * **two** ### Multiple Choice (21mks) Identify the choice that best completes the statement or answers the question. 1. The molecules of what kind of substance are shown here? (Diagram of two molecules with multiple identical units) * **c. a compound** 2. The molecules of what kind of substance are shown here? (Diagram of two molecules with two different units) * **b. a mixture** 3. The molecules of what kind of substance are shown here? (Diagram of a single unit) * **a. an element** 4. The atoms of what kind of substance are shown here? (Diagram of multiple identical units) * **a. an element** 5. What type of matter is gold? * **a. an element** 6. In this diagram of an atom, which part is labelled with a 2? (Diagram of a generic atom with labels 1, 2, 3, 4) * **a. an electron** 7. In this diagram of an atom, which part is labelled with a 3? (Diagram of a generic atom with labels 1, 2, 3, 4) * **c. a proton** 8. In this diagram of an atom, which part is labelled with a 1? (Diagram of a generic atom with labels 1, 2, 3, 4) * **d. the nucleus** 9. In this diagram of an atom, which part is labelled with a 4? (Diagram of a generic atom with labels 1, 2, 3, 4) * **b. a neutron** 10. Which part of an atom has a negative charge? * **a. an electron** 11. Which part of an atom has no charge? * **b. a neutron** 12. Which parts of an atom are found in the nucleus? * **c. protons and neutrons** 13. An element has an atomic number of 17. How many protons does each atom of the element have? * **d. 17** 14. In the formula H₂O, what does the "2" indicate? * **d. There are two atoms of hydrogen in each molecule.** 15. Which model might represent a molecule of NH3? (Diagram of four molecules with two, two, three and four units) * **c. (Diagram of a molecule with three units)** 16. Which model might represent a molecule of NaCl? (Diagram of four molecules with two, two, one and one unit) * **b. (Diagram of a molecule with one unit)** 17. What are two or more different types of atoms bonded together called? * **b. a compound** 18. Which formula might represent this model? (Diagram of a molecule with two units) * **b. NaCl** 19. A group of elements is * **a. located in a vertical column in the periodic table.** 20. The element tin has a mass number of 119. Its atomic number is 50. How many electrons does an atom of tin have? * **a. 50** 21. Each atom contains an equal number of * **a. electrons and protons.** ### Matching (14mks) Match each description to the correct term. | Description | Term | |---|---| | a column on the periodic table | **g. a group** | | the last column on the periodic table | **a. the noble gases** | | the second column of the periodic table | **b. the alkali earth metals** | | the column right before the last column of the periodic table | **c. the halogens** | | elements on the right side of the periodic table | **e. a non-metal** | | a row on the periodic table | **f. a period** | | elements on the left side of the periodic table | **d. a metal** | Match the scientist with his contribution to the history of the atom. | Scientist | Contribution | |---|---| | Democritus | **d. Proposed that matter was made of 4 elements: Earth, Air, Fire and Water** | | Robert Boyle | **b. Defined the term element and beleived that air was not an element but a mixture** | | John Dalton | **c. Proposed the atomic model and a theory of why elements differ from each other** | | Empedocles | **a. Suggested that matter was made of tiny particles called atoms** | | Ernest Rutherford | **e. Came up with the Nuclear Model using a gold foil experiment** | | J.J. Thompson | **f. Proposed the "raisin bun" model of the atom, discovered very light negative particles called electrons** | | Alchemists | **g. Devised chemical symbols, invented many laboratory tools, thought they could turn lead into gold** | ### Short Answer (25mks) 1. What does the atomic number of an element tell you? (2mks) * The atomic number gives you the number of protons and electrons. 2. Consider the demonstration involving Alkali metals (Lithium, Sodium and Potassium) and their reaction in water and answer the following questions. (4mks) * a) What happened when the above metals were placed in water? * They all reacted by fizzing and creating a gas and turning the water pink * b) Were the reactions similar? Explain what was different between each reaction. * Yes in the way that they all created a gas however, each element had a more agressive reaction than the one above it on the periodic table. * c) Which element had the strongest reaction? * Potassium had the strongest reaction. 3. Draw the classification of matter chart that we studied in class. (7mks) * (Drawing of a chart with the following structure) * **Matter** * **Pure Substance** * element * compound * **Mixture** * homogeneous mixture * heterogeneous mixture 4. Explain the 2,8,8 rule. (2mks) * 2 electrons can fit in the first energy level, 8 in the second and 8 in the third. 5. How is the mass number for an atom calculated? (2mks) * Mass = protons + neutrons 6. What do the elements in the same group/family in the periodic table have in common with respect to valence electrons? (1mk) * They have the same number of valence electrons. 7. Draw a Bohr-Rutherford model of a sodium atom. (3mks) * (A drawing of a Bohr-Rutherford model with 11 protons, 12 neutrons, and 11 electrons in the correct shells)