24. The formation of an ionic bond involves the (1 point)
transfer of electrons.
transfer of neutrons.
transfer of protons.
sharing of electrons.
25. In a polar covalent bond, (1 point)
electrons are shared equally between atoms.
a cation is bonded to an anion.
electrons are transferred between atoms.
electrons are not shared equally between atoms.
26. Beryllium, Be, and chlorine, Cl, form a binary ionic compound with a one-to-two ratio of beryllium ions to chloride ions. The formula for the compound is (1 point)
Be2Cl.
Be2Cl.
BeCl2.
Be2Cl2.
27. When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, magnesium nitrate and carbonic acid form. Carbonic acid then breaks down into water and carbon dioxide. Which two types of reactions take place in this process? (1 point)
synthesis and decomposition
single-replacement and combustion
double-replacement and decomposition
double-replacement and combustion
28. In terms of energy, how would you classify the following chemical reaction?
2Cu + O2 2CuO + 315 kJ (1 point)
endothermic
exothermic
both endothermic and exothermic
neither endothermic nor exothermic
29. A log is burning in a fireplace. If the amount of oxygen reaching the log is decreased, which of the following statements is true? (1 point)
The reaction rate increases.
The reaction rate decreases.
The reaction rate remains the same.
The reaction rate depends only on the temperature.
30. A student dissolved equal amounts of salt in equal amounts of warm water, room-temperature water, and ice water. Which of the following is true? (1 point)
The salt dissolved most quickly in the warm water.
The salt dissolved most quickly in the room-temperature water.
The salt dissolved most quickly in the ice water.
none of the above
31. A solution that contains more solute than it would normally hold at that temperature is said to be (1 point)
saturated.
unsaturated.
supersaturated.
concentrated.
32. Which of the following is NOT a property of an acid? (1 point)
tastes sour
usually reacts with a metal
changes the color of an indicator
feels slippery
33. A base is defined as a compound that produces (1 point)
hydroxide ions in solution.
hydrogen ions in solution.
hydronium ions in solution.
sodium ions in solution.
34. A small amount of acid is added to a buffer solution. The pH of the solution will (1 point)
increase.
decrease.
stay about the same.
become neutral.
35. Uranium-238 undergoes alpha decay. Therefore, uranium-238 will (1 point)
remain stable.
change into a different element altogether.
emit neutral particles and no energy.
none of the above
36. What type of radiation is emitted when polonium-212 forms lead-208? (1 point)
an alpha particle
a beta particle
gamma radiation
all of the above
37. Transmutation involves (1 point)
nuclear change.
chemical change.
both a nuclear change and a chemical change.
neither a nuclear nor a chemical change.
38. During nuclear fission, great amounts of energy are produced from (1 point)
very small amounts of mass.
tremendous amounts of mass.
a series of chemical reactions.
particle accelerators.
39. Which of the following conversion factors would you use to change 18 kilometers to meters? (1 point)
1000 m/1 km
1 km/1000 m
100 m/1 km
1 km/100 m
40. According to John Dalton’s observations, when elements combine in a compound, (1 point)
the ratio of their masses is always the same.
each element contributes an equal number of atoms.
their volumes are always equal.
their masses are always equal.
41. Which of the following provides the best analogy for an electron in an atomic orbital? (1 point)
a bee moving from flower to flower in a garden
a bird resting on a tree branch
an ant crawling on the surface of a leaf
a bee trying to escape from a closed jar
42. The tendency of an element to react is closely related to (1 point)
its atomic mass.
attractions between its atoms.
the number of valence electrons in atoms of the element.
the ratio of protons to neutrons in atoms of the element.
Update:i just basically need an answer key to check my answers i was up till 1 am working on this review was just hoping someone would help me out
Answers & Comments
Verified answer
My goodness, that's an awful lot of homework you want someone to do for you. This tells me that there isn't just one concept that you need help with, but rather that you are too lazy to do your work yourself. We're quite happy to help you understand a difficult chemistry concept, but not to do most of your homework.
For instance, if you didn't understand chemical bonding, then we would tell you that the oversimplified textbook definition of an "ionic" bond is one where an electron is transferred from one atom to another creating charged particles. But keep in mind that there are few to no actual 100% ionic bonds. "Ionic" and "covalent" are the two extremes of chemical bonds, and as such are "ideal" bonds. But real bonds have characteristics of both types.