FREE CHEMISTRY AND STUDY GAMES ABOUT TEST EXAM

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FREE CHEMISTRY AND STUDY GAMES ABOUT TEST EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -19 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: In the binary ionic compound lithium iodide, Lil, which element forms anions?

Answer:

Potassium Question 2: In a periodic table that included electron dot diagrams, in which column would the diagrams contain more dots- Group 2 (the alkaline metals) or Group6A (the oxygen family)?

Answer:

Group 6A Question 3: Which material is most likley to shatter if you strike it with a hammer-sodium chloride or bronze?

Answer:

Sodium Chloride Question 4: The structure in a metal lattice can be described as cations surrounded bt a pool of shared electrons. What two properties of metals can be explained by this structure?

Answer:

ductility and malleability

Question 5: Study the electron dot diagrams in figure 6-1. Which of the elements are most likely to react and form a compound? What type of compound are they likely to form?

Answer:

neon because it is the most stable element because its highest occupied energy level is filled.

Question 6: Why are metals good conductors of heat?

Answer:

free moving atoms in metals carry both heat and electric current Question 7: Mixing magnesium and aluminum together produces an excellent lightweight material from which to make airplane parts. What is this type of mixture called?

Answer:

Alloy

Question 8: In potassium bromide, KBr, which element forms anions?

Answer:

Bromine Question 9: In an electron dot diagram of potassium, there is one dot. In an electron dot diagram of silicon, there are four dots. Which element would you expect to be more reactive?

Answer:

Potassium because one dot is more reactive.Question 10: How do you know that magnesium is the more metallic element in the compound magnesium oxide. MgO?

Answer:

Magnesium is a metal, and metals comes first.Question 11: Are covalent bonds more likely to be found in compounds containing both metals and nonmetals or compounds containing only nonmetals?

Answer:

Only nonmetals

Question 12: In sodium chloride, NaCl, are the cations sodium ions or chloride ions?

Answer:

Sodium ions Question 13: Sodium, an alkali metal, and chlorine, a halogen, are both in Period 3 of the periodic table. Which element has a higher ionization energy? Explain your answer.

Answer:

Chlorine Question 14: The molecules in compound AB are strongly polar, while the molecules in compound XY are non-polar. Which substance probably has the higher boiling point?

Answer:

AB Question 15: How does the ability of metals such as copper and alloys such as steel to be drawn into wires affect the possible uses of these materials?

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If these metals can be drawn into wires, then they can be used to make long cables Question 16: Fluorine is the most reactive nonmetal. To Fluorine's immediate right in the periodic table is neon, a noble gas that does not form chemical bonds. Explain this contrast in reactivity in terms of atomic structure.

Answer:

the electron configuration of an element determines its reactivity.Question 17: How is an electron dot diagram a useful model for focusing on the chemical properties of an element?

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An electron dot diagram shows the number of valence electrons.Question 18: Suppose a covalent compound has a relatively high boiling point compared to molecules with a similar mass. Are the molecules in the compound likely to be polar or nonpolar?

Answer:

Polar

Question 19: Water droplets tend to have a spherical, round shape. Explain this fact in terms of the polar nature of water molecules?

Answer:

Because water molecules are polar, there are strong attractions between water molecules.