Multiple choice

1. Which element's atomic radius changes the most in size when it becomes ionized? 

A. Lithium

B. Chlorine

C. Fluorine

D. Sodium

2. Which of the following are not grouped according to similar chemical properties? 

A. Cobalt, iron, nickel

B. Gold, silver, copper

C. Iron, copper, ruthenium

D. Ruthenium, iridium, palladium

3. What is the electro negativity difference for a bond between potassium and iodine? 

A. 4.6

B. 1.7

C. 3.3

D. 0.4

4. Due to shape and polarity differences, the boiling point of carbon dioxide dioxide is _______ water. 

A. lower than

B. equal to

C. much higher than

D. slightly higher than