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- 1. Multiple ChoiceHow many protons and electrons are in a copper (II) ion with a mass of 64?27 protons, 29 electrons27 protons, 31 electrons29 protons, 27 electrons29 protons, 31 electrons
- 2. Multiple ChoiceWhat is the name of the compound with the chemical formula CrCl3?chromium tetrachloridechromium trichloridechromium (II) chloridechromium (III) chloride
- 3. Multiple ChoiceIf two oxygen atoms combine to make a molecule, what type of bond will they form?an ionic bonda hydrogen bonda metallic bonda covalent bond
- 4. Multiple ChoiceHow does an S-2 ion differ from an electrically neutral sulfur atom?mass numberatomic numbernuclear chargenumber of electrons
- 5. Multiple Choice
Which element contains 3 valence electrons?heliumlithiumberylliumboron - 6. Multiple ChoiceWhat do the ions K+, Ca+2, and Cl- have in common?They have the same number of protonsThey will form covalent bonds with oxygenThey have the same electron configuration as argonThey are larger than their corresponding atoms
- 7. Multiple ChoiceWhat is the correct chemical formula for sodium sulfate?NaSO4Na2SO4Na(SO4)2Na2(SO4)2
- 8. Multiple ChoiceWhich element is located in Group 2 and Period 6 of the periodic table?BaMoRaW
- 9. Multiple ChoiceWhat compound has the chemical formula MgI2?di-iodide magnesiumiodide (II) magnesiummagnesium (II) iodidemagnesium iodide
- 10. Multiple ChoiceThe below information represents the melting point of several substances.
SUBSTANCE MELTING PT (oC)
Cl2 -101.5
Na 97.72
NaCl 801
What best explains the high melting point of salt?The strong electrostatic attraction between a sodium atom and chlorine atomThe strong electrostatic attraction between a sodium cation and chlorine anionThe strong electrostatic attraction between a sodium anion and a chlorine cationThe strong bond formed when electrons are shared between a sodium atom and a chlorine atom - 11. Multiple ChoiceIn which block does an element with the electron configuration [Xe} 6s24f145d106p1 belong?s blockp blockd blockf block
- 12. Multiple ChoiceA scientist hypothesizes that a colorless gas produced during a chemical reaction is carbon dioxide. Which observation would confirm this hypothesis?The gas will react violentlyA glowing splint placed in the gas will burn brighterA burning splint will "bark"A burning splint will go out
- 13. Multiple ChoiceWhich of these elements has the smallest atomic radius?Berylliumoxygensodiumsulfur
- 14. Multiple ChoiceAn atom contains 70 protons, 70 electrons, and 99 neutrons. What is the mass number?23916914070
- 15. Multiple ChoiceWhich of the following particles has a positive one charge(+1) ?protonelectronneutronbeta particle
- 16. Multiple ChoiceAccording to the periodic table, Mg will most likely react with elements in which of these groups?121718
- 17. Multiple ChoiceWhich of the following shows the correct number of atoms of each element in the formula Mg(NO3)2?Mg = 1, N = 2, O = 5Mg = 1, N = 1, O = 6Mg = 1, N = 2, O = 6Mg = 2, N = 2, O = 6
- 18. Multiple ChoiceWhich of these compounds is most likely to contain an ionic bond?H2CO2PCl5CaO
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