5.2 Short quiz

Atoms of elements that are in the same group have the same number of

• protons

• neutrons

• valence electrons

• protons and neutrons

What is the property of noble gases

• They are highly reactive

• They form colored compounds

• They react vigorously with water

• They are highly unreactive

Semiconductors are elements that

• have large atomic masses but small atomic numbers.

• do not form compounds.

• can conduct heat and electricity under certain conditions.

• are extremely hard.

In Mendeleev’s periodic table, elements in each column had similar

• atomic masses

• properties.

• atomic numbers

• symbols.

How was Mendeleev’s periodic table arranged?

• by increasing atomic mass

• by decreasing atomic mass

• by increasing atomic number

• by decreasing atomic number

Each column of the periodic table is a.

• an element.

• a group.

• an isotope.

• a period.

The three main groups of elements are metals, nonmetals, and

• inert gases

• alkali metals

• radioactive isotopes.

• metalloids.

Most elements are

• metals

• non-metals

• metalloids

• noble gases

Which statement about the alkali metals is correct?

• They are located in the left-most column of the periodic table.

• They are extremely nonreactive.

• They are usually gases.

• They are extremely reactive

What are the properties of transition metals?

• They are highly reactive

• They form colored compounds

• They are gases

• None of the above