Periodic Table of Elements

What is common among elements in the same group?

• They have the same number of energy levels.

• They have the same number of valence electrons.

• They have the same number of protons.

• They have the same number of neutrons and protons.

Which statement best describes the arrangement of elements in the periodic table?

• Elements are arranged in decreasing atomic mass from left to right.

• Elements are arranged in decreasing atomic number from left to right.

• Elements are arranged in increasing atomic number from left to right

• Elements are arranged in increasing number of neutrons from left to right.

Which pair of elements has the most similar properties?

• Be and B

• O and S

• H and Hg

• Na and F

Which group in the periodic table of elements has the greatest number of metals?

• Group 1 (IA)

• Group 6 (VIB)

• Group 13 (IIIA)

• Group 18 (VIIIA)

He, Ne, and Ar are all noble gases. What is common among these gases?

• They are flammable.

• They are highly reactive.

• They are metals.

• They are unreactive.

When elements fall under the same row, this means they belong to the same ______.

• group

• period

When elements fall under the same column, this means they belong to the same ______.

• group

• period

What group of elements are highly reactive and is placed on the first column on the left side of the periodic table?

• Group IA (Alkali Metals)

• Group IIA (Alkali Earth Metals)

• Group VIIA (Halogens)

• Group VIIIA (Noble Gases)

What group of elements are highly reactive and is placed on the second column on the right side of the periodic table?

• Group IA (Alkali Metals)

• Group IIA (Alkali Earth Metals)

• Group VIIA (Halogens)

• Group VIIIA (Noble Gases)

What group of elements are least reactive and is placed on the last column on the right side of the periodic table?

• Group IA (Alkali Metals)

• Group IIA (Alkali Earth Metals)

• Group VIIA (Halogens)

• Group VIIIA (Noble Gases)