Periodic Trends

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

• Ar
• He
• Kr
• Rn

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 Period 4 (row 4) is - 

• K
• Kr
• Fe
• Fe

Of the halogens, which has the smallest radius?

• F

• Br

• He

• At

Which of the following will have a higher electronegativity than arsenic (As)?

• Carbon (C)

• Neon (Ne)

• Antimony (Sb)

• Germanium (Ge)

Which of the following halogens has the greatest electronegativity?

• Chlorine (Cl)

• Bromine (Br)

• Iodine (I)

• Astatine (At)

What is a positively-charged ion which forms when an atom loses electrons?

• atom

• ion

• cation

• anion

What is a negatively-charged ion which forms when an atom gains electrons?

• cation

• anion

• electron

• ion

Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

Atomic radius INCREASES when you go ________ a group