Each pair has a set of alien insect pictures.

Please follow the procedure on pg 370-371.

Draw the missing pictures and answer “Analyze and Conclude” questions 7-9 on pg 64 of your ISN.

Alien Insect Periodic Table

Please write questions 7-9 in your notebook to finish for

homework if you don’t get to them!

Please write HW in your agendaPlease update your notebooks

Be prepared to discuss last night’s homework!

Do Now

Page #

Title Date

71 Periodic Table Basics 12/02/1472 Study Guide Guide 12/02/14

The periodic table is a chart of the elements arranged into rows and columns according to their physical and chemical properties.

Elements are grouped together by their similarities in properties and trends.

Periodic Table

Dimitri Mendeleev was a Russianchemist who created the earliestperiodic table.

He arranged the elements in a list using their atomic masses and found that the properties of the elements repeated in a pattern.

He used this table to predict the properties of elements that were not discovered yet.

Periodic means “repeating pattern.”

Dimitri Mendeleev

Rows on the periodic table are called periods.

Columns on the periodic table are called groups or families or groups.

Each individual element has an atomic number. This is the number of protons that the atom of this element has.

As you move from left to right, and top to bottom, the atomic number and the atomic mass increases.

Periodic Table Basics

The Periodic Table of Elements

Atomic number increases!Atomic mass increases!

The Periodic Table of Elements

Atomic mass increases!

The Periodic Table of Elements

Number of valence electronsElectrons in the outermost energy

level!

Reading an Element’s Square

How do I find…

# of protons = atomic number

# of electrons = atomic number

*in a neutral atom*

# of neutrons = mass number - atomic number

*round the mass number to the nearest whole number*

Using the Periodic TableMetals, Nonmetals, Metalloids

The periodic table is sorted by similarities in propertiesThere are three main categories on the periodic table: metals, nonmetals, and metalloids.

These categories are broken up into smaller families with more specific properties. (Alkali metals, Halogens, Noble Gases, etc.)Today we’re going to look at the 3 main categories and the properties that they share.

The Periodic Table

Have luster (shiny)Malleable and ductileHigh densities and high melting pointsGood conductors of electricity, but poor insulatorsMost are solidsExamples of families: alkali metals and alkaline earth metals are very reactive.

Metals

Have no lusterBrittleGood insulators, but poor conductors of electricityMost are gasesThe elements that make up life are nonmetals (carbon, oxygen, hydrogen)Examples of families:− Halogens: Very reactive− Noble gases: Nonreactive

or inert

Nonmetals

Have properties of metals and nonmetalsSemiconductors: conducts electricity at high temperature, insulates at low temperaturesUsed in electronic devicesExample: Silicon is the most abundant metalloid.

Metalloids

Open your textbooks to pg 348-349.

Fill in all atomic numbers and atomic masses for each element on your sheet. Then, cut out each element square.

Use the textbook to help you sort each element in their correct category in your foldable(metal, nonmetal, metalloid).

Foldable Cutouts