8.5C - Interpreting the Periodic Table

What do the periods on the Periodic Table represent?

• Groups of elements with similar chemical properties

• The number of valence electrons in the atoms of the elements

• The number of occupied energy levels or shells in the atoms of the elements

• The reactivity of the elements

Which of the following best describes the elements found in the same group on the Periodic Table?

• They have the same number of protons.

• They have similar chemical and physical properties.

• They have the same atomic mass.

• They are all metals.

How are elements classified into metals, nonmetals, and metalloids on the Periodic Table?

• By their atomic number

• By their electron configurations

• By their physical and chemical properties

• By their periods and groups

What determines the reactivity of an element?

• Its period

• Its group

• The number of valence electrons

• The size of its nucleus

How does the arrangement of the Periodic Table help predict the properties of elements?

• By arranging elements in order of decreasing atomic mass

• By grouping elements with similar outer shell electron configurations together

• By placing elements with the most protons at the top

• By arranging elements randomly

Which group on the Periodic Table contains the noble gases?

• Group 1

• Group 17

• Group 18

• Group 2

Elements in the same period have the same number of what?

• Protons

• Valence electrons

• Energy levels

• Electrons in the outermost shell

What trend in reactivity is observed among the alkali metals (Group 1) as you move down the group?

• Reactivity decreases

• Reactivity remains constant

• Reactivity increases

• Reactivity first increases, then decreases

Which of the following is a characteristic of elements in the same group?

• They have the same atomic radius.

• They have the same number of valence electrons.

• They have the same atomic number.

• They have the same number of neutrons.

How are the orbitals or energy levels of an atom represented in the Periodic Table?

• By its group number

• By its period number

• By its atomic mass

• By its atomic number