Periodic Table Chapter 12 Flashcards

Questions and Answers

What are alkali metals?

Gaseous elements in Group 0

Intermediate properties between metals and nonmetals

Very reactive with one valence electron (correct)

Reactive, but less than alkaline earth metals

What are alkaline earth metals?

Intermediate between metals and nonmetals

Unreactive gases in Group 0

Very reactive, with two valence electrons (correct)

Less reactive than alkali metals (correct)

What are transition metals?

Elements in groups 3 through 12 of the periodic table.

What is a metalloid?

An element with properties intermediate between metals and nonmetals. Signup and view all the answers

What are halogens?

Reactive nonmetals Signup and view all the answers

What are noble gases?

Gaseous elements including helium, neon, argon, krypton, xenon, and radon. Signup and view all the answers

What are lanthanides?

A series of metallic elements in Group 3 of the periodic table. Signup and view all the answers

What are actinides?

Elements with atomic numbers 89 to 103, located below the lanthanides. Signup and view all the answers

Study Notes

Alkali Metals

Extremely reactive elements with one valence electron.
Found in Group 1 of the periodic table.

Alkaline Earth Metals

Reactive, but less so than alkali metals.
Contains two valence electrons and located in Group 2 of the periodic table.

Transition Metals

Consist of 38 elements found in groups 3 through 12.
Characterized by ductility, malleability, and their ability to conduct electricity and heat.
Often referred to as rare earth elements.

Metalloids

Elements exhibiting properties between metals and nonmetals.
Function as electrical semiconductors.

Halogens

Group 17 elements, known for high reactivity.
Comprise nonmetals such as fluorine, chlorine, bromine, iodine, and astatine.

Noble Gases

Group 18 elements including helium, neon, argon, krypton, xenon, and radon.
Previously thought to be unreactive due to full valence shells; however, compounds of xenon, krypton, and radon are now known.

Lanthanides

A series of metallic elements in Group 3, often classified as rare earth metals.
The series includes elements but sometimes excludes lanthanum (atomic number 57).

Actinides

Comprise elements with atomic numbers ranging from 89 to 103.
Located in the row beneath the lanthanides in the periodic table, also regarded as rare earth metals.

Description

Test your knowledge of the periodic table with these flashcards covering Chapter 12, which includes alkali metals, alkaline earth metals, and transition metals. Each card provides definitions essential for understanding these groups and their reactivities. Perfect for students preparing for chemistry exams!