Unit 1 Chemistry Warm Ups. Mrs. Hilliard
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1 Unit 1 Chemistry Warm Ups Mrs. Hilliard
2 Unit Vocabulary Write on a sheet of paper or notecards with definitions- use the book. 1. States of matter 2. Mixture 3. Substance 4. Atom 5. Phase change 6. Scientific method 7. Distillation 8. Hypothesis 9. Homogeneous mixture 10. solution 11. compound 12. Law of conservation of mass 13. Element 14. Atomic number 15. Isotope 16. Heterogeneous mixture 17. Mass number 18. Filtration 19. Physical change 20. Chemical change
3 Unit 1 Vocabulary Write on a sheet of paper or notecards with definitions- use the book. 1. States of matter- the physical forms in which all matter naturally exists on Earth. 2. Mixture- a physical blend of two or more substances in which each substance retains its individual properties. 3. Substance- matter that has a definite composition, also known as a chemical. 4. Atom- the smallest particle of an element that retains all the properties of that element. 5. Phase change- a transition of matter from one state to another. 6. Scientific method- a systematic series of steps for problem solving. 7. Distillation- a technique that can be used to physically separate homogenous mixtures based on differences in boiling points. 8. Hypothesis- a tentative, testable statement or prediction about what has been observed. 9. Homogeneous mixture- has a uniform composition throughout, also called a solution. 10. Solution- a uniform mixture, also known as a homogeneous mixture. 11. Compound- a chemical combination of two or more different elements.
4 Unit 1 Vocabulary Write on a sheet of paper or notecards with definitions- use the book. 12. Law of conservation of massstates that mass is not created nor destroyed in a chemical reaction. 13. Element- a pure substance that cannot be broken down into simpler substances by physical or chemical means. 14. Atomic number- the number of protons in an atom. 15. Isotope- atoms of the same element with different numbers of neutrons. 16. Heterogeneous mixture- does not have a uniform composition and individual substances remain distinct. 17. Mass number- the number that represents the sum of the protons and neutrons in the nucleus of an atom. 18. Filtration- a technique that uses a porous barrier to separate a solid from a liquid. 19. Physical change- a type of change that alters the physical properties of a substance but does not change its composition. 20. Chemical change- one or more substances changing into new substances.
5 Intro to Chemistry 1. What is matter? 2. Which of the following would be considered matter? a. air b. sunlight c. ideas d. dreams 3. Which of the following would not be considered matter? a. book b. desk c. oxygen d. heat 4. Which state of matter has a definite volume but not a definite shape? Indefinite volume and indefinite shape? Definite volume and definite shape? 5. Which of the following is an example of a pure substance? a. element b. pure water c. CO 2 d. NO 3
6 Intro to Chemistry 1. What is matter? Anything that has mass and takes up space 2. Which of the following would be considered matter? a. air b. sunlight c. ideas d. dreams 3. Which of the following would not be considered matter? a. book b. desk c. oxygen d. heat 4. Which state of matter has a definite volume but not a definite shape? Liquid Indefinite volume and indefinite shape? Gas Definite volume and definite shape? solid 5. Which of the following is an example of a pure substance? a. element b. pure water c. CO 2 d. NO 3
7 Intro to Chemistry 6. What type of substances with a constant composition can be broken down into elements by chemical processes? 7. Which of the following is an example of a chemical change? a. ice melting b. cutting paper c. water boiling d. iron rusting 8. Which of the following is an example of a physical change? a. tearing paper b. burning wood c. digesting food d. release of a gas 9. Which of the following is a compound? a. hydrogen b. brass c. CO 2 d. KOH+NaCl
8 Intro to Chemistry 6. What type of substances with a constant composition can be broken down into elements by chemical processes? compound 7. Which of the following is an example of a chemical change? a. ice melting b. cutting paper c. water boiling d. iron rusting 8. Which of the following is an example of a physical change? a. tearing paper b. burning wood c. digesting food d. release of a gas 9. Which of the following is a compound? a. hydrogen b. brass c. CO 2 d. KOH+NaCl
9 Elements, Compounds, and Mixtures 10. What is a solution also called? 11. What is made up of two or more different elements that are combined chemically? 12. Which of the following is an example of a homogeneous mixture? a. milk b. salad c. fruit salad d. chicken noodle soup 13. Which of the following is an example of a heterogeneous mixture? a. water b. coke c. kool-aid d. italian dressing 14. Which of the following is an alloy? a. gold b. brass c. lead d. nickel
10 Elements, Compounds, and Mixtures 10. What is a solution also called? Homogeneous mixture 11. What is made up of two or more different elements that are combined chemically? compound 12. Which of the following is an example of a homogeneous mixture? a. milk b. salad c. fruit salad d. chicken noodle soup 13. Which of the following is an example of a heterogeneous mixture? a. water b. coke c. kool-aid d. italian dressing 14. Which of the following is an alloy? a. gold b. brass c. lead d. nickel
11 Chemists and units 15. Who is the chemist that found that there must be a dense nucleus at the center of an atom by shooting particles at gold foil? 16. Who discovered the atom but did not know about protons and electrons? 17. What are the units used in science? 18. Which of the following is an example of Dalton s atomic theory but is no longer true according to the modern theory? a. atoms are indivisible in chemical reactions b. atoms are not created or destroyed in chemical reactions c. all atoms of a given element are identical d. elements are made up of tiny particles called atoms 19. Who discovered electrons and the Plum Pudding Model? 20. What is a metric unit for length? 21. A student found the mass of Na to be 0.25g ± The actual mass was 0.60g. Was this student accurate, precise, both, or neither?
12 Chemists and units 15. Who is the chemist that found that there must be a dense nucleus at the center of an atom by shooting particles at gold foil? Rutherford 16. Who discovered the atom but did not know about protons and electrons? Dalton 17. What are the units used in science? Meters, liters, and grams 18. Which of the following is an example of Dalton s atomic theory but is no longer true according to the modern theory? a. atoms are indivisible in chemical reactions b. atoms are not created or destroyed in chemical reactions c. all atoms of a given element are identical d. elements are made up of tiny particles called atoms 19. Who discovered electrons and the Plum Pudding Model? Thomson 20. What is a metric unit for length? Meters, kilometers, centimeters, millimeters, decimeters 21. A student found the mass of Na to be 0.25g ± The actual mass was 0.60g. Was this student accurate, precise, both, or neither? precise
13 Periodic Table 22.What is the name for the elements in group 7A? 23.What is the name for the elements in group 2A? 24.What are atoms with the same number of protons but different numbers of neutrons called?
14 Periodic Table 22.What is the name for the elements in group 7A? Halogens 23.What is the name for the elements in group 2A? Alkaline Earth metals 24.What are atoms with the same number of protons but different numbers of neutrons called? isotopes
15 Periodic Table and Ions 25. What are the majority of the elements on the periodic table? 26. What is the name of group 1A elements? 27. What is the name of group 8A elements? 28. Which of the following is incorrectly paired? a. N, halogen b. Ar, noble gas c. Li, alkali metal d. Mg, Alkaline Earth Metals 29. What is the name of the rows across the periodic table? 30. Can the number of protons change in an atom? 31. How many protons are found in a phosphorus ion?
16 Periodic Table and Ions 25. What are the majority of the elements on the periodic table? Metals 26. What is the name of group 1A elements? Alkali metals 27. What is the name of group 8A elements? Noble gases 28. Which of the following is incorrectly paired? a. N, halogen b. Ar, noble gas c. Li, alkali metal d. Mg, Alkaline Earth Metals 29. What is the name of the rows across the periodic table? periods 30. Can the number of protons change in an atom? No, only neutrons and electrons can change 31. How many protons are found in a phosphorus ion? 15
17 A Fig. 1 B States of matter 32. What is the state of matter shown in A? 33. What is the state of matter shown in B? 34. What is the state of matter shown in C? 35. Which of the following is a chemical property of Copper? a. forms a blue solution when reacted with ammonia b. density of 8.92 g/cm 3 c. is a good conductor of heat and electricity d. melting point is 1085 C 36. What is the change in state when a solid becomes a liquid? 37. What procedure is shown in figure 1? C
18 A Fig. 1 B States of matter 32. What is the state of matter shown in A? Solid 33. What is the state of matter shown in B? Liquid 34. What is the state of matter shown in C? Gas 35. Which of the following is a chemical property of Copper? a. forms a blue solution when reacted with ammonia b. density of 8.92 g/cm 3 c. is a good conductor of heat and electricity d. melting point is 1085 C 36. What is the change in state when a solid becomes a liquid? melting 37. What procedure is shown in figure 1? filtration C
19 Atoms 38.What is the atomic number for the element shown? 39.What is the atomic mass? 40.What is the smallest part of an element that keeps it s properties? 41.What has a charge of -1?+1?0? 42.What is an atom composed of? 43.What scientist described the neutron?
20 Atoms 38.What is the atomic number for the element shown? What is the atomic mass? What is the smallest part of an element that keeps it s properties? atom 41.What has a charge of -1?+1?0? Electron, proton, neutron 42.What is an atom composed of? Protons, neutrons, and electrons 43.What scientist described the neutron? Chadwick
21 Chart 1-Atoms Atom Protons Neutrons Electrons Isotopes Chart 2- Atoms Atom Protons Neutrons Electrons Mass # Silicon Phosphorus From chart 1, what two atoms are isotopes? 45. Which two atoms have the same mass? 46. From chart 2, how many neutrons are in one atom of phosphorus? 47. How many electrons are in a neutral atom of silicon? 48. Which is the number of protons in 20 Ne? What number is the number of neutrons in 23 Na? What is found in the nucleus of the atom?
22 Chart 1-Atoms Atom Protons Neutrons Electrons Isotopes Chart 2- Atoms Atom Protons Neutrons Electrons Mass # Silicon Phosphorus From chart 1, what two atoms are isotopes? 1 and Which two atoms have the same mass? 1 and From chart 2, how many neutrons are in one atom of phosphorus? How many electrons are in a neutral atom of silicon? Which is the number of protons in 20 Ne? What number is the number of neutrons in Na? What is found in the nucleus of the atom? Protons and neutrons 10
23 Elements 51.From the atom shown below, what is the mass number? 52.What is the correct symbol for this atom? 53.What element does this atom represent? 54.What was the main problem with Dalton s Atomic Theory? 55.What is the chemical symbol for the isotope of selenium with 40 neutrons?
24 Elements 51.From the atom shown below, what is the mass number? 6 52.What is the correct symbol for this atom? 6 Li 3 53.What element does this atom represent? Lithium 54.What was the main problem with Dalton s Atomic Theory? All atoms of an element are not identical, they have different masses 55.What is the chemical symbol for the isotope of selenium with 40 neutrons? Se
25 Elements Continued 56.What is the correct symbol for an atom with 23 protons and 28 neutrons? 57.What element has 19 protons? 58.What two quantities are used to determine the average atomic mass of all the isotopes of an element? 59.What are the steps of the scientific method? 60.What element contains 29 electrons and is used for wiring?
26 Elements Continued 56. What is the correct symbol for an atom with 23 protons and 28 neutrons? 51 V What element has 19 protons? K 58. What two quantities are used to determine the average atomic mass of all the isotopes of an element? Mass of isotope and % abundance 59. What are the steps of the scientific method? 1. determine the problem 2.form a hypothesis 3. design and perform experiment 4. analyze data 5. draw conclusions 60. What element contains 29 electrons and is used for wiring? Cu
27 Element Name Symbol # of protons # of Electrons # of Neutrons 1. Aluminum 2. P Bismuth Sb 7. Cesium 8. Fr
28 Ion Name Ion symbol # of protons # of Electrons # of Electrons lost or gained Same # electrons as what noble gas? 1. Aluminum 2. P Bismuth Sb 3-7. Cesium 8. Fr
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