Elements and the Periodic Table

Mendeleev created the first periodic table by arranging elements in order of

• decreasing atomic mass.

• increasing atomic number.

• increasing atomic mass.

• increasing melting points and densities.

From an element’s location in the periodic table, you can predict

• its properties.

• its chemical symbol.

• its chemical name.

• when it was discovered.

At room temperature, more than half of the nonmetal elements are

• alloys

• liquids

• gasses

• solids

In general, which of the following statements about metals is true?

• Metals need to be stored in sealed containers for safety.

• Metals are malleable, ductile, and can carry an electric current.

• Metals are highly reactive substances.

• Metals do not react with oxygen.

The atomic number of an element is based on the

• mass of its nucleus.

• number of protons in its nucleus.

• number of electrons around its core.

• number of neutrons in its nucleus.

Tags

NGSS.HS-PS1-8

The elements that do not ordinarily form compounds are

• elements in the carbon family.

• halogens

• metals

• noble gasses

The two most common alkaline earth metals are

• copper and zinc.

• sodium and potassium.

• iron and silver.

• calcium and magnesium.

The average mass of all the isotopes of an element is called the

• atomic mass

• family

• atomic number

• group

Which of these statements about a column of the periodic table is true?

• The elements have similar characteristics.

• The elements have a wide range of characteristics.

• The elements have the same atomic number.

• The elements have the same atomic mass.

In the periodic table, the most reactive metals are found

• in Group 1, the first column on the left.

• in Period 1, the first row across the top.

• in Groups 13 through 16 in the center.

• in Periods 6 and 7 at the bottom.