Cumulative Exam Review (Chemistry & Motion)

Which properties do metalloids share with metals?

• Both are shiny and are brittle.

• Both are very conductive and are dull.

• Both are brittle and are gases at room temperature.

• Both are shiny and are solid at room temperature.

Which best describes a semiconductor?

• Semiconductors are more conductive than a nonmetal and less conductive than a metal.

• Semiconductors are more conductive than a nonmetal and less conductive than a metalloid.

• Semiconductors have a high electrical conductivity.

• Semiconductors have a no electrical conductivity.

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A sample of a solid nonmetal is compared to a sample of a solid metal. Both samples have the same volume. What is the most likely difference between the two samples?

• The nonmetal has more mass.

• The nonmetal takes up more space.

• The metal has more mass.

• The metal takes up more space.

Which element is a halogen?

• chlorine (Cl)

• oxygen (O)

• carbon (C)

• radon (Rn)

Sonya reads the element riddle below.

I am shiny. I form +1 ions. There’s more!

I am the most reactive metal in Period 4.

Who am I?

Which element is the answer to the riddle?

• krypton

• potassium

• sodium

• bromine

Based on its location on the periodic table, which metal is likely to be less reactive than both strontium and sodium?

• magnesium (Mg)

• barium (Ba)

• cesium (Cs)

• rubidium (Rb)

Which best compares and contrasts how John Newlands and Dmitri Mendeleev organized elements?

• Both Newlands and Mendeleev arranged elements according to their chemical properties, but only Newlands used atomic mass as well.

• Both Newlands and Mendeleev arranged elements according to their atomic masses, but only Mendeleev used chemical properties as well.

• Both Newlands and Mendeleev organized elements into groups, but only Newlands used a table with rows and columns.

• Both Newlands and Mendeleev organized elements into a table with rows and columns, but only Mendeleev named different groups of elements.

This is how platinum appears in the periodic table.

Rounded to the nearest whole number, what is the atomic mass of platinum?

• 78

• 117

• 195

• 273

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A researcher is using a particle accelerator in an experiment studying isotopes. How can the researcher change one isotope into a different isotope of the same element?

• by removing valence electrons

• by adding valence electrons

• by adding or removing protons

• by adding or removing neutrons

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The symbol P represents the element phosphorus. This element’s atomic number is 15. How many protons and electrons are in a P–3 ion?

• 15 protons and 3 electrons

• 12 protons and 15 electrons

• 15 protons and 18 electrons

• 18 protons and 15 electrons

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