PROPERTIES OF ELEMENTS

GROUP 1

• Alkali metals have low melting and boiling points compared to other metals.
• They are very soft and can be cut with a knife.
• They also have a low density and will(lithium,sodium and potassium will float on water)
• They have on electron on the outer shell which is loosely bound.
• They react readily with nonmetals,particularly halogens.

GROUP 2

• Low densities
• Low boiling points
• Low melting points
• lose two outermost electrons to form cations with a 2+ charge.
• Ductile,Malleable

GROUPS 3-12

• Form colored compounds
• Good conductors of heat and electricity
• Can be bent into shape
• less reactive than alkali metals such as sodium
• have high melting points-but Mercury is a liquid at room temperature

GROUPS 13-16

• They have a poor reaction
• Increase in atomic radius
• Electrode potential increase
• Ionization energy decreases
• Only group that contain elements classified as metalloids

GROUP 17

• Nonmetals
• Boiling points increase
• Highly electronegative
• Highly reactive
• can be harmful or lethal to biological organisms in sufficient quantities

GROUP 18

• Odorless and colorless
• Low chemical reactivity
• Full valence shell
• All conduct electricity
• High solubility

LANTHANIDES AND ACTINIDES

• Bright silvery appearance
• Magnetic