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SECTION 5.2- THE MODERN PERIODIC TABLE After this presentation you will be able to: SECTION OBJECTIVES 1.Describe the arrangement of the elements in the modern periodic table 2. Explain how the atomic mass of an element is determined and how atomic mass units are defined 3. Identify general properties of metals, metalloids, and nonmetals 4. Describe trends across rows and groups on the periodic table
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Starter QuestionWhat are some ways we can classify elements ?
(we know by properties but anything else ?)
Integrated Science
CHAPTER 5.2THE PERIODIC TABLE
SECTION 5.2- THE MODERN PERIODIC TABLE
After this presentation you will be able to:
SECTION OBJECTIVES
1. Describe the arrangement of the elements in the modern periodic table
2. Explain how the atomic mass of an element is determined and how atomic mass units are defined
3. Identify general properties of metals, metalloids, and nonmetals
4. Describe trends across rows and groups on the periodic table
SECTION 5.2- THE MODERN PERIODIC TABLE
RECAP
- As we learned, elements in the same column of the
periodic table are related because their properties repeat
at regular intervals
SECTION 5.2- THE MODERN PERIODIC TABLE
REMINDER- Remember, Mendeleev put the periodic table together
in 1860 almost 40 years before Rutherford discovered
protons
- So, today we can say the periodic table is also organized
by atomic number because we know about the nucleus
SECTION 5.2- THE MODERN PERIODIC TABLE
PERIODS
- The rows on the periodic table
- The number of elements in a row has to do
with the orbitals/energy level of their
electrons
SECTION 5.2- THE MODERN PERIODIC TABLE
PERIODS
- As you go down the rows, the elements
have one more electron in a new energy
level
SECTION 5.2- THE MODERN PERIODIC TABLE
GROUPS
- The columns on the periodic table
- Elements in the same group have the same
electron configuration, and therefore have
similar chemical properties
SECTION 5.2- THE MODERN PERIODIC TABLE
GROUPS
SECTION 5.2- THE MODERN PERIODIC TABLE
PERIODIC LAW
- The pattern of repeating properties in a
group on the periodic table is called the
periodic law
SECTION 5.2- THE MODERN PERIODIC TABLE
CLASSIFYING ELEMENTS
- We can classify elements by:
- 1.properties
- 2. natural occurrence
- 3. state of matter at room temp.
SECTION 5.2- THE MODERN PERIODIC TABLE
2 PERIODIC TABLES
1. Color in elements by states of matter
2. Color in elements by properties
Starter QuestionGive an example of an element
for each state of matterSolid:Liquid:Gas:
DATE: Monday February 4th 2013
Integrated Science
* CLASSIFYING BY STATE OF MATTER
Integrated Science
* CLASSIFYING BY PROPERTIES
