Get a clicker please

1. Get a clicker please Semester Exam Review

2. Please make your selection The study of matter and the changes in matter best describes the science of • Biology • Physics • Microbiology • Chemistry

3. Please make your selection Chemistry is • a biological science. • a physical science. • concerned mostly with living things. • the study of electricity.

4. Please make your selection How many valence electrons are in an atom of magnesium? A) 4 B) 2 C) 3 D) 5

5. Please make your selection The branch of chemistry that includes the study of materials and processes that occur in living things is • Organic chemistry • Physical chemistry • Analytical chemistry • Biochemistry

6. Please make your selection The study of substances containing carbon is • Organic chemistry • Inorganic chemistry • Analytical chemistry • Biochemistry

7. Please make your selection Technology is • Analysis of chemical behavior • Application of chemical principles to predict events • Application of scientific knowledge to solve problems • Study of scientific processes

8. Please make your selection What is the formula of the ion formed when potassium achieves noble-gas electron configuration? A) K+ B) K- C) K2+ D) K2-

9. Please make your selection Basic research is • Carried out for the sake of increasing knowledge • The production and use of products that improve our life. • The identification of the components and composition of materials • Carried out to solve a problem

10. Please make your selection Which of the following is a heterogeneous mixture? A) soil B) air C) steel D) salt water

11. Please make your selection Matter includes all of the following except • Smoke • Water vapor • Light • Air

12. Please make your selection Chemical properties • Include changes of state of a substance • Include mass and color • Include changes that alter the identity of a substance • Can be observed without altering the identity of a substance

13. Please make your selection Two features that distinguish matter are • Mass and velocity • Weight and velocity • Mass and volume • Weight and volume

14. Please make your selection • Who was the man who lived from 460 B.C.–370 B.C. and was among the first to suggest the idea of atoms? • A Atomos • B Democritus • C Thomson • D Dalton

15. Please make your selection • A horizontal row of the periodic table is usually referred to as a • A family. • B period. • C group. • D property.

16. Please make your selection • What does the number 84 in the name krypton-84 represent? • A the mass number • B the atomic number • C twice the number of protons • D the sum of the protons and electrons

17. Please make your selection • In a chemical reaction, the type of products obtained is largely determined by which part of the reacting chemicals? A protons B neutrons C nuclei D electrons

18. Please make your selection • The sum of the protons and neutrons in an atom equals the ____. • A atomic mass • B mass number • C atomic number • D nucleus number

19. Please make your selection • Which of the following changes to a metal is a chemical change? • A melting • B polishing • C bending • D rusting

20. Please make your selection • The smallest particle of an element that retains the properties of that element is a(n) ____. • A proton • B atom • C electron • D neutron

21. Please make your selection • What is the net charge of the ionic compound calcium fluoride? • A 0 • B 1 • C 1– • D 2–

22. Please make your selection • Which of the following elements has the smallest first ionization energy? • A potassium • B magnesium • C sodium • D calcium

23. Please make your selection • The modern periodic table is arranged in order of increasing atomic ____. • A radius • B mass • C number • D charge

24. Please make your selection • Which of the following is a chemical property? • A ability to react with oxygen • B color • C freezing point • D hardness

25. Please make your selection • The first letter in a properly written chemical symbol is always • A underlined. • B capitalized. • C italicized. • D bold faced.

26. Please make your selection • What element has the electron configuration 1s22s22p63s23p2? • A silver • B selenium • C nitrogen • D silicon

27. Please make your selection • When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place? • A neither a physical change nor a chemical change • B a physical change • C both a physical change and a chemical change • D a chemical change

28. Please make your selection • The letter "p" in the symbol 4p indicates the ____. • A orbital shape • B principle energy level • C speed of an electron • D spin of an electron

29. Please make your selection • What type of ions have names ending in -ide? • A only cations • B only metal ions • C only anions • D only gaseous ions

30. Please make your selection • Which of the following elements has the smallest ionic radius? • A Li • B O • C K • D S

31. Please make your selection • Which of the following measurements contains two significant figures? • A 0.004 40 L • B 0.004 04 L • C 0.004 00 L • D 0.000 44 L

32. Please make your selection • Which of the following elements forms an ion with a 1– charge? • A sodium • B fluorine • C hydrogen • D potassium

33. Please make your selection • Which state of matter has a definite volume and takes the shape of its container? • A solid • B liquid only • C gas only • D both b and c

34. Please make your selection • What is the charge on the strontium ion? • A 2+ • B 1+ • C 1– • D 2–

35. Please make your selection • What is the element with the highest electronegativity value? • A fluorine • B calcium • C cesium • D helium

36. Please make your selection • How many significant figures are in the measurement 811.40 grams? • A two • B five • C four • D three

37. Please make your selection • Isotopes of the same element have different A chemical behavior. B positions on the periodic table. C mass numbers. D atomic numbers.

38. Please make your selection • Express the sum of 7.68 m and 5.0 m using the correct number of significant digits. A 13 m B 12.68 m C 12.7 m D 10 m

39. Please make your selection • Which of the following is a cation? A Ca2+ B SO32- C sulfate D chlorite

40. Please make your selection • Which state of matter takes both the shape and volume of its container? A solid B liquid only C gas only D both b and c

41. Please make your selection How many electrons can occupy the s orbital at each energy level? • Two, if they have opposite spins • Two, if they have the same spin • One • No more than eight

42. Please make your selection • How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain? A. 50 protons, 50 electrons, 75 neutrons B . 70 neutrons, 75 protons, 50 electrons C. 120 neutrons, 50 protons, 75 electrons D. 75 electrons, 50 protons, 50 neutrons

43. Please make your selection Divide 5.7 m by 2 m. The quotient is correctly reported as • 2.8 m • 2.85 m • 2.9 m • 3 m

44. Please make your selection The graph of a direct proportion is a(n) • Straight line • Ellipse • Parabola • Hyperbola

45. Please make your selection Argon, krypton, and xenon are • Alkaline earth metals • Noble gases • Actinides • Lanthanides

46. Please make your selection Mendeleev is credited with developing the first successful • Periodic table • Method of determining atomic number • Test for radioactivity • Use of x-rays

47. Please make your selection Which of the following shows a physical change occurring? • a. A peach spoils. • b. A copper bowl tarnishes. • c. A piece of jewelry turns your skin green. • d. A hot-glue gun melts a glue stick.

48. Please make your selection Which element listed is considered to be unreactive (inert) based on its location on the periodic table? • Ca • P • Si • Ar

49. Please make your selection Which of the following observations does not indicate that a chemical change has occurred? • a. change of state • b. formation of a precipitate • c. absorption of energy • d. release of a gas

50. Please make your selection What is the atomic number of aluminum? • 13 • 14 • 26.98 • 26.9815