Download Groups of the Periodic Table

Guided Reading 12.3/12.4
Name ______________________________
Date _________
The Periodic Table & Reading the Periodic Table (pg. 291-292)
1. Currently, there are ___________ elements that have been identified. ________ of these
are occur naturally.
2. How is the Periodic Table arranged?
3. Rows (left to right) are known as ________________ and columns (up and down) are called
_____________________.
4. What three main categories of elements are classified on the Periodic Table?
Atomic Mass (pg. 293)
5. What is an atomic mass unit (amu)?
6. What is the average atomic mass of an element?
Groups of the Periodic Table (pg. 294)
7. What is the name of the group of elements that includes Lithium, Sodium, and Potassium?
8. Which elements represent the “halogens” on the Periodic Table? ___________________
9. Why are the noble gases called “inert gases”?
Energy Levels and the Periodic Table (pg. 295)
10.Periods represent the number of ______________ ________________ needed to hold the
appropriate number of electrons.
11. Where are the outermost electrons in atoms located and why are they important?
12.3 Section Review Questions (pg. 296) – answer questions 1-8 in the space provided.
Chapter 12 Section 4 – page 297
State of matter at room temperature (pg. 297)
12. Most elements are ____________ at room temperature.
13.What does it mean for an element to be in a solid state?
Periodic Properties of the Elements (pg. 298)
14. Look at the graphs of the melting and boiling points. What trend (pattern) do you notice
as we move across each row on the periodic table?
15.What is periodicity?
Thermal and Electrical conductivity (pg. 299)
16. What is the difference between an electrical conductor and a thermal conductor?
17. What type of element makes a good electrical and thermal conductor?
18. What is an insulator and which types of elements make good insulators?
Metals and metal alloys (pg. 300)
19.What is an alloy?
20.Name 2 alloys, the elements that they contain, and some of their uses.
Carbon and carbon-like elements (pg. 301)
21.What element is important to life and what two forms of this element occur in nature?
22.________________ is the second most abundant element on Earth.
23.Name two common materials made of silicon.
24.Rubies and emeralds are compounds of _______________ and _______________ with
traces of other elements.
25.What is silicon’s most famous application in today’s world?
Nitrogen, Oxygen, and Phosphorus (pg. 302)
26. Name and state the percentages of the two most abundant gases in the Earth’s
atmosphere.
27.__________percent of Earth’s surface (crust) is made up of oxygen.
28. Name two important uses of nitrogen.
29. Of what important life process is Phosphorus a key ingredient? What other “fun thing” is
phosphorus a part of?
Section Review questions 12.4 (page 303). Answer the section review questions 1-12