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- 1. Multiple ChoiceWhich of these determines the identity of an atom?Number of electronsNumber of protonsNumber of energy levelsNumber of neutrons
- 2. Multiple ChoiceThe nucleus of an atom containsonly neutronsprotons and electronsprotons and neutronsonly electrons
- 3. Multiple ChoiceHow are the elements in the modern periodic table arranged?In alphabetical orderby atomic massby date of discoveryby number of protons
- 4. Multiple ChoiceWhich elements are LEAST LIKELY to combine with other elements?halogensnoble gasesalkaline metalstransition metals
- 5. Multiple ChoiceCarbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide isan iona nucleusa compoundan atom
- 6. Multiple ChoiceCrystals can be made up of which of the following kinds of properties?atoms onlyatoms or ionsatoms, ions, or moleculesmolecules only
- 7. Multiple ChoiceWhich of these is NOT made up of two or more substances that are combined physically?homogeneous mixturecompoundheterogeneous mixturesolution
- 8. Multiple ChoiceFiltration can be used to separate a mixture of ...a solid and a liquida liquid and a gastwo liquidstwo solids
- 9. Multiple ChoiceWhat happens during a physical change?new substances formthe identity of a substance is changedA chemical reaction occursa property of the substance changes but its identity stays the same
- 10. Multiple Choicewhich of the following is a chemical change?water boilingpaper being cutice meltingiron rusting
- 11. Multiple ChoiceOrange juice without pulp is what?Heterogeneous mixturehomogeneous mixturecompoundelement
- 12. Multiple ChoiceOrange juice with pulp is a what?homogeneousheterogeneouscompoundelement
- 13. Multiple ChoiceWhy is there a staircase on the periodic table?separate gases from solidsseparate metals from nonmetalsseparate transition metals from halogensseparate metals from solids
- 14. Multiple ChoiceA new element is discovered that is highly reactive where would it go?left sideright sidemiddlethere are no new elements
- 15. Multiple ChoiceWhy are the noble gases stable?They have 1 electron in outer shellThey have no electrons in out shellThere outer shell is fullThe protons equal the electrons
- 16. Multiple ChoiceWhich family is most reactive?HalogenAlkali metalsAlkaline metalstransition metals
- 17. Multiple ChoiceIf two or more atoms bond together they are always called amoleculecompoundhomogeneous mixtureheterogeneous mixture
- 18. Multiple ChoiceCompounds must always have equal number of atoms of each element presenttruefalse
- 19. Multiple ChoiceFizzing, color change, or gas generation are signs of what?physical changechemical change
- 20. Multiple ChoiceCooking an egg is a what?physical changechemical change
- 21. Multiple ChoiceWhich is example of a chemical and physical change?Tearing paper and breaking an eggTearing paper and burning itiron rusting and cooking an eggboiling water and breaking an egg
- 22. Multiple ChoiceWhen ice melts it is an example ofnuclear changechemical changephysical changeatmospheric change
- 23. Multiple ChoiceHow many atoms of oxygen are in C021230
- 24. Multiple ChoiceThe law of conservation of mass states what?Matter is neither destroyed nor changedMatter is neither destroyed or createdMatter is neither created nor changedElements are the smallest unit of matter
- 25. Multiple ChoiceWhich of the following is true according to the law of the conservation of matter?The mass of the reactants is less than the productsThe mass of the reactants equals the products minus gasThe mass of the reactants equals the mass of the products in a closed systemGases are generated during chemical reactions
- 26. Multiple ChoiceStudents conduct an experiment in an open system. Which of the following are most likely the reason that the scale does not balance?More reactants are neededA catalyst is neededGas escaped during the reactionNo reaction occurred
- 27. Multiple ChoiceA neutral element has 11 protons and 12 neutrons. How many electrons are present?not enough information101112
- 28. Multiple ChoiceIf the atomic mass of an element is 100 and there are 49 protons, how many neutrons are there?495051100
- 29. Multiple ChoiceA bohr model shows what?number of electronsnumber of protons and neutronsnumber of protons, neutrons, and electronsnumber of protons, neutrons, electrons, and valence electrons
- 30. Multiple ChoiceDuring a combustion reaction, oxygen is consumed and CO2 is always released.TrueFalse
- 31. Multiple Choice2H2 + O2 -> 2H20
Which of the following are not true?This is a balanced equationThere are 2 atoms of oxygen in the productThis is not a balanced equationThere are 2 molecules of hydrogen in the reactants - 32. Multiple ChoiceGroups and families are thesamedifferent onesrows acrossnoble gases only
- 33. Multiple Choice
The yellow atoms are calledmetalsnonmetalsmetalloidsnoble gases - 34. Multiple ChoiceThe blue atoms are calledmetalsnonmetalsmetalloidsnoble gases
- 35. Multiple ChoiceCovalent bonds are formed withmetal and nonmetalmetal and metalnonmetal and nonmetalonly noble gases
- 36. Multiple ChoiceIonic bonds are formed withmetal and nonmetalmetal and metalnonmetal and nonmetalonly noble gases
- 37. Multiple Choicewhat does the 6 represent?Atomic massatomic numberchemical symbolelement name
- 38. Multiple ChoiceWhat does the C represent?atomic massatomic numberelement namechemical symbol
- 39. Multiple ChoiceCarbon Dioxide's chemical formula is known as....COCO2Co2
- 40. Multiple ChoiceEach row in the periodic table is called agroupperiodclusterunit
- 41. Multiple ChoiceThe atomic number tells you what?number of electronsnumber of protonsnumber of neutronsboth electrons and protons in an atom.
- 42. Multiple ChoiceThe atomic number of this pictured element is2858.6934NiNickel
- 43. Multiple ChoiceBeryllium is in group number______.Group 2Group 3Group 4Group 7
- 44. Multiple ChoiceThe period for Bromine is ___________.324
- 45. Multiple ChoiceWhat does the 1.00794 stand for?Hydrogenatomic numberatomic massatomic explosion
- 46. Multiple ChoiceWhat is the total number of subatomic particles in the nucleus of an atom of 36Cl17343653
- 47. Multiple ChoiceWhat is the unit used to measure weighted average atomic mass?amugramangstromnanogrm
- 48. Multiple ChoiceHow many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?50 p+, 50 e-, 75 n75 e-, 50 p+, 50 n120 n, 50 p+, 75 e-70 n, 75 p+, 50 e-
- 49. Multiple ChoiceIsotopes of the same element have differentnumber of neutronsnumber of protonsnumber of electronsatomic number
- 50. Multiple ChoiceAn element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are152 p+, 76 e-76 p+, 0 e-38 p+, 38 e-76 p+, 76 e-
- 51. Multiple ChoiceThe particles that are found in the nucleus of an atom areneutrons and electronselectrons onlyprotons and neutronsprotons and electrons
- 52. Multiple ChoiceWhich of the following is true about subatomic particles?Electrons are negatively charged and the heaviestProtons are positively charged and the lightestNeutrons have no charge and the lightestMass of the neutron nearly equals the mass of the proton
- 53. Multiple ChoiceThe smallest particle of an element that retains the properties of that element is a(n)atomelectronprotonneutron
- 54. Multiple ChoiceA reaction that generates a new product like H2 + O2 -> H20
is a what?synthesis reactiondecomposition reactionsingle replacementdouble replacement - Answer choicesTagsAnswer choicesTags