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Matter & Energy
Quiz by Tyisha Smith
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​Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
 There is a change in volume.
The two liquids mix into a solution.
The two liquids form a new substance.
There is a change in shape.
Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
Which statements correctly compare metals and nonmetals?
Which substance listed in the chart is made up of the most atoms?
Based on the data given, the unknown metal is most likely —
Which process describes only a physical change?
Fox squirrels are common in Texas. Fox squirrels primarily eat acorns and nuts from trees but also eat insects. Some predators of fox squirrels include owls, snakes, and bobcats.
Which diagram best represents how energy would flow to and from the fox squirrel?
Which pair of elements has reactivity that is similar to chlorine, Cl?
Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown by the balanced chemical equation.
AgNO3 + NaCl → AgCl + NaNO3
What happens to the total mass as the reaction takes place?
One of the properties that makes copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity?
Sodium and lithium have similar chemical properties. What characteristic of these elements explains why they are chemically similar?
Which element has the same number of energy levels as lithium?
Oxygen and oxygen-containing compounds are involved in many different reactions. Which balanced equation represents a reaction that involves 14 atoms of oxygen?
Which of these observations is an indication that a chemical reaction has occurred?
