Introduction

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Introduction. Metals High luster when cleaned and high conductivity Non-metals Low luster when cleaned and low conductivity Metalloids Combo of metals and non-metals. Families Periods. Columns of elements are called groups or families. - PowerPoint PPT Presentation

Transcript of Introduction

Page 1: Introduction
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MetalsHigh luster when cleaned and high

conductivityNon-metals

Low luster when cleaned and low conductivityMetalloids

Combo of metals and non-metals

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Families Families PeriodsPeriods

• Columns of elements are called groups or families.

• Elements in each family have similar but not identical properties.

• All elements in a family have the same number of valence electrons.

• Each horizontal row of elements is called a period.

• The elements in a period are not alike in properties.

• The first element in a period is always an extremely active solid. The last element in a period, is always an inactive gas.

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Valence ElectronsValence Electrons• Valence electrons

are the electrons in the outer energy level of an atom.

• These are the electrons that are transferred or shared when atoms bond together.

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ALKALI METALSALKALI METALSGroup 1• Hydrogen is not a member,

it is a non-metal• 1 electron in the outer shell• Soft and silvery metals• Very reactive, especially

with water• Conduct electricity

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ALKALINE EARTH METALSALKALINE EARTH METALSGroup 2• 2 electrons in the

outer shell• White and

malleable• Reactive, but less

than Alkali metals• Conduct

electricity

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TRANSITION METALSTRANSITION METALSGroups in the middle Good conductors of

heat and electricity.Some are used for

jewelry.The transition metals

are able to put up to 32 electrons in their second to last shell.

Can bond with many elements in a variety of shapes.

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MORE INFO ON THE TRANSITION MORE INFO ON THE TRANSITION METALS…METALS…

The Lanthanide series can be found naturally on Earth. Only one element in the series is radioactive.

The Actinide series are all radioactive and some are not found in nature.

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BORON FAMILY BORON FAMILY Group 3• 3 electrons in

the outer shell• Most are

metals• Boron is a

metalloid

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CARBON FAMILY CARBON FAMILY Group 4• 4 electrons in

the outer shell• Contains

metals, metalloids, and a non-metal Carbon (C)

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NITROGEN FAMILY NITROGEN FAMILY Group 5• 5 electrons in the

outer shell• Can share

electrons to form compounds

• Contains metals, metalloids, and non-metals

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OXYGEN FAMILY OXYGEN FAMILY Group 6• 6 electrons in

the outer shell• Contains

metals, metalloids, and non-metals

• Reactive

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HALOGEN FAMILYHALOGEN FAMILYGroup 7• 7 electrons in

the outer shell• All are non-

metals• Very reactive

are often bonded with elements from Group 1

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Noble GasesNoble GasesGroup 8Exist as gasesNon-metals8 electrons in the

outer shell = FullHelium (He) has only

2 electrons in the outer shell = Full

Not reactive with other elements


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