Biological Importance of Elements

Why is sodium fluoride safe to use in toothpaste?

• Because of the stability of chemical bonds

• Because sodium is not reactive

• Because it does not form bonds

• Because fluoride is not reactive

What happens to electronegativity as you move across the periodic table?

• It stays the same

• It decreases from top to bottom

• It increases from left to right

• It decreases from left to right

What is the relationship between ionization energy and the tendency to lose electrons?

• Lower ionization energy means a higher tendency to lose electrons

• Higher ionization energy means a higher tendency to lose electrons

• Ionization energy does not affect electron loss

• Ionization energy is unrelated to electron gain

Which element is known for having the highest electronegativity?

• Oxygen

• Fluorine

• Chlorine

• Sodium

Why is oxygen important in biological processes?

• It forms weak bonds with hydrogen

• It is not reactive

• It plays a role in the electron transport chain

• It has a low affinity for electrons