Download The Periodic Table

The Periodic Table of
the Elements
Elements:
 pure substances made of only 1 kind of atom
Period:
 row of elements across table
 every element in period has same number of
shells/orbits
Group/Family:
 column of elements down table
 every element in same column has same # of
valence electrons (e- on outer shell)

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Important Groups
Group 1 – Alkali Metals:
 soft and highly reactive
Group 2 – Alkaline Earth Metals:
 light and reactive
Group 17 – Halogens:
 usually gases, very reactive
Group 18 – Noble Gases
 very stable, do not react
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Periodic Table: Ferocious Elements Resources - TES Connect
The Periodic Table
Atomic Structure

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all things are made of
matter
all matter made of tiny
particles called atoms
atoms made of 3
kinds of subatomic
particles:
1. Protons (p+)
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positively charged
in nucleus
do not move
is the atomic number
2. Neutrons (n0)
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neutral charge
in nucleus
do not move
p+ + n0 = atomic mass
3. Electrons (e-)
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negative
in orbits around nucleus
can be lost, gained, or shared with other
atoms