The Periodic Table Review

Which is NOT true about all of these elements?

• They are all in the same group

• They all have the same number of valence electrons

• They all have the same number of protons

• They all share similar properties

What do elements in the same group on the periodic table have in common?

• They have similar chemical symbols

• They have the same atomic number

• They have similar chemical properties

• They have the same average atomic mass

Find Fluorine (F) on the Periodic Table.

How many valence electrons does Fluorine have?

• 2

• 7

• 9

• 18

Why do the elements in group 16 share similar chemical properties?

• These elements are found in the same period.

• These elements all have the same atomic number.

• These elements’ atoms have the same number of valence electrons.

Which two elements share similar properties?

• Nitrogen (N) and Phosphorus (P)

• Nitrogen (N) and Carbon (C)

• Nitrogen (N) and Helium (He)

• Nitrogen (N) and Sulfur (S)

Find Fluorine (F) on the Periodic Table. How many energy shells (rings) does Fluorine have?

• 1

• 2

• 3

• 4

Atoms of different elements can join together in different arrangements to produce a variety of substances that are found on Earth. There are more than 100 known elements. Which of the following best describes these elements?

• Most of these elements are nonmetals.

• Most of these elements are metalloids.

• Most of these elements are metals.

As you go down a column in the periodic table, the reactivity of metals:

• Decreases

• Increases

• Remains constant

• First increases, then decreases

What does the atomic number of an element tell us?

• The number of neutrons in the element.

• The number of protons in the element.

• The atomic mass of the element.

• The number of electrons in the element.

What does the periodic table show about each element?

• Only the atomic number and symbol.

• Only the atomic mass and how it reacts with other elements.

• The atomic number, symbol, atomic mass, and how it reacts with other elements.

• Only the symbol and atomic mass.