Tredns (copy)

What does the group number on the periodic table tell us?

What does the group number on the periodic table tell us?

how many electrons are in the outer shell of an element

What does the period number on periodic table tell us

amount of energy levels

Atomic size trend in the periodic table

As you move from left to right bottom to top atomic size decreases

• Because there are more protons in the nucleus they have a stronger pull on electrons

Metal reactivity trend in periodic table

As you move from left to right bottom to top metal reactivity decreases

• This is because there are more electron shells and they can lose electrons more easily

non-metal reactivity

As you move from right to left top to bottom reactivity decreases

• This is because there are more electron shells and they cannot attract electrons as easily.

Metallic bonding and its properties

Metal and metal which remove electrons and make positive ions

properties:

• Conduct electricity

• malleable

• high melting point
  

covalent bonding and its properties

Non-metal and non-metal Share electron pairs’

properties:

• doesn’t Conduct Electricity

• Breaks easy

• low melting point
  

Ionic bonding and its properties

metal and non-metal Oppositely charged ion

properties:

• Conduct electricity (molten)

• breakable

• high melting point