Periodic Table and Bohr Diagrams Review

What is the main purpose of the periodic table?

• To organize all known elements by atomic number and chemical properties

• To list all chemical reactions

• To show the history of chemistry

• To display only metals

Which chemical symbol represents a liquid element in the periodic table?

• Hg

• Na

• O

• C

How does the periodic table help scientists in understanding elements? (DoK Level 2)

• It allows scientists to predict properties and behaviors of elements based on their position

• It only shows the names of elements

• It is used to create chemical reactions directly

• It is a decorative chart for classrooms

Imagine you are given an unknown element with atomic number 17. Using the periodic table, what can you infer about its chemical properties and classification? (DoK Level 3)

• It is a nonmetal and likely a gas with reactive properties

• It is a metal and solid at room temperature

• It is a metalloid and has both metallic and nonmetallic properties

• It is a noble gas and unreactive

Which element in the periodic table has 1 valence electron?

• Hydrogen

• Oxygen

• Carbon

• Neon

How many valence electrons does oxygen have?

• 6

• 2

• 4

• 8

Which group of elements in the periodic table has 8 valence electrons?

• Noble gases

• Alkali metals

• Halogens

• Transition metals

Explain why elements with 8 valence electrons are generally unreactive.

• Their outer electron shell is full, making them stable.

• They have no electrons.

• They are metals.

• They have only one electron.

What is the name given to the elements in Group 2 of the periodic table?

• Noble Gases

• Alkaline earth metals

• Halogens

• Transition metals

Which group in the periodic table is known for containing the most reactive nonmetals?

• Group 1

• Group 17

• Group 3

• Group 18