Matter & Energy
Quiz by Tyisha Smith
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- Q 1/15Score 0
Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
29There 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.
- Q1
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.
300s - Q2
Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
Cobalt, Co, and nickel, Ni
Hydrogen, H, and cesium, Cs
Fluorine, F, and chlorine, Cl
Boron, B, and aluminum, Al
30s - Q3
How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
19
39
78
20
300s - Q4
Which statements correctly compare metals and nonmetals?
Metals cannot be stretched into thin wires.
Nonmetals can be stretched into thin wires.
Metals tend to be good conductors of thermal energy.
Nonmetals tend to be good insulators of thermal energy
Metals are dull and brittle.
Nonmetals are shiny and malleable
Metals are good insulators of electricity.
Nonmetals tend to be good conductors of electricity.
300s - Q5
Which substance listed in the chart is made up of the most atoms?
Nitric acid
Carbonic acid
Phosphoric acid
Sulfuric acid
300s - Q6
Based on the data given, the unknown metal is most likely —
iron
gold
tin
silver
300s - Q7
Which process describes only a physical change?
Process 4
Process 2
Process 1
Process 3
300s - Q8
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?
30s - Q9
Which pair of elements has reactivity that is similar to chlorine, Cl?
Sulfur, S, and argon, Ar
Sulfur, S, and bromine, Br
Fluorine, F, and iodine, I
Fluorine, F, and argon, Ar
300s - Q10
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?
The mass decreases.
The mass remains constant.
The mass first decreases and then increases.
The mass increases.
300s - Q11
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?
Gold, Au
Bromine, Br
Radon, Rn
Nitrogen, N
300s - Q12
Sodium and lithium have similar chemical properties. What characteristic of these elements explains why they are chemically similar?
Their atoms both have one valence electron
Their atoms have the same number of energy levels.
Their atoms contain equal numbers of protons and electrons.
Their atoms both have more neutrons than protons
300s - Q13
Which element has the same number of energy levels as lithium?
Potassium
Beryllium
Sodium
Magnesium
300s - Q14
Oxygen and oxygen-containing compounds are involved in many different reactions. Which balanced equation represents a reaction that involves 14 atoms of oxygen?
2Na + 2 H2O → 2NaOH + H2
4Fe + 3 O2 → 2 Fe2O2
2 C 2H6+ 7 O 2 → 4 CO2 + 6 H2O
NH4Cl + KOH → NH 3+ H 2O + KCl
300s - Q15
Which of these observations is an indication that a chemical reaction has occurred?
Steam forms above boiling water.
A solid forms when a clear solution is frozen.
Sugar crystals form on the sides of a boiling pot of sugar water.
A solid forms when two clear solutions are mixed
300s
