The Structure of the Atom — Unit test Answers
Which element has 16 protons in its nucleus?
Which list includes only physical properties?
A student performs the following experiment.Step 1: She pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.Step 2: She lets the yellow particles settle in the beaker and then separates the colorless liquid by decantation.What has most likely occurred in the beaker?
A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
Which statement describes an intensive property of matter?
A student is using a copper strip and a strong chlorine solution in her experiment. Which of these is a chemical property of one of her materials?
Which element has 32 protons in its nucleus?
Which process is a chemical change?
The diagram below shows some subatomic particles.Which of these statements best identifies the particle that is labeled with an X?
Which term refers to a property that depends only on the amount of a substance?
A student investigated some properties of lead and recorded the findings in the table below.PropertyObservationcolordull graydensity11.3 g/cm3volume of sample3.00 cm3melting point327°Creaction with airlead oxide forms on the surfaceelectrical conductivityconducts some electricityWhich statement is true with respect to the investigation?
Which of these is a chemical property of a substance?
Which of these is an example of a physical change?
Which element has 16 protons in its nucleus?
The table below gives the numbers of protons, electrons, and neutrons in four atoms.AtomNumber of protonsNumber of neutronsNumber of electrons198929983991049109Based on the table, which atom has a charge of –1?
Which list includes only physical properties?
The table below shows the freezing points of four substances.SubstanceFreezing point (°C)benzene5.50water0.00butane–138nitrogen–210.The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these substances will solidify before the temperature reaches 0°C?
To observe a [BLANK] property of a substance, the substance must interact with another substance, such as when gasoline burns or when sodium metal reacts with water.
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