Periodic Trends

As you move down a group, atomic radius increases because - 

• you add more and more neutrons
• you add more and more protons
• you add more and more shells (energy levels)
• you add more atomic mass

The atom with the largest atomic radius in Group 18 is - 

• Ar
• He
• Kr
• Rn

As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 

• the number of protons increases, so attraction to electrons increases
• the number of energy levels increases
• the number of electrons increases
• the atomic mass increases

The atom with the largest atomic radius in Period 4 (row 4) is - 

• K
• Kr
• Fe
• Fe

The energy required to remove electrons is the definition of: 

• Electronegativity
• Atomic Number
• Atomic Radius
• Ionization

Electronegativity is...

• the ability of an atom to attract/ accept electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Which element has the greater ionization energy?

• Magnesium (Mg)

• Phosphorus (P)

As you look from left to right across a period, electronegativity

• increases

• decreases

Which of these elements has the highest ionization energy?

• Lithium (Li)
• Potassium (K)
• Francium (Fr)
• Sodium (Na)

The atom with the largest atomic radius in Group 18 is - 

• Ar
• He
• Kr
• Rn