Periodic Table Arrangement

Basic Facts

• Elements are arranged by increasing atomic numbers

• Metals, non metals and metalloids

• Groups and Periods

Periods

• Also known as rows• The atomic number increases by

one• Tells the number of shells• Mass number increases slowly• Examples: Li, N, Ne

Groups

• Also known as columns• Tells the number of electrons in the

outermost shell• Atomic increases by more than one• Mass goes up by a lot• Example: Noble gases

Metals

• Found to the left of the staircase• They give their valence electrons away• Conduct heat and electricity, are

ductile and malleable• Have 1, 2 or 3 valence electrons• Examples: Calcium, Sodium and

Aluminum• Ionic charge is positive

Non Metals

• Found to the right of the stair case• They take valence electrons• They are brittle, dull and no

conductivity• Have 4, 5, 6, 7 or 8 valence electrons• Examples: Sulfur, Carbon and

Chlorine• Ionic charge is negative

Metalloids

• Found along the stair case (either side of the stair case)

• Give and take electrons• Have the properties of both metals

and non metals• Ionic charges can be positive or

negative• Example: Silicon and Arsenic

THE END!!!