Periodic Table Trends

As we move down a group, the atomic radius (atom size)

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the atomic radius (atom size)

• increases
• decrease
• increases then decrease
• does not change

As we move down a group, the ionization energy (energy needed to lose an electron and make an ion)

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the ionization energy (energy needed to lose an electron and make an ion)

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the metallic properties

• increases
• decrease
• increases then decrease
• does not change

As we move down a group, the metallic properties

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the electronegativity 

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the electronegativity

• increases
• decrease
• increases then decrease
• does not change

As we move down a group, the ionic radius (size of the ion)

• increases
• decrease
• increases then decrease
• does not change

As we move across a period, the ionic radius (size of the ion)

• increases
• decrease
• increases then decrease
• does not change