AP Chem Unit 1

Front

What is the formula for the compound formed by magnesium and fluorine?

Back

MgF₂

Front

Why does MgCl₂ have a high melting point?

Back

MgCl₂ has a high melting point due to strong ionic bonds between Mg²⁺ and Cl⁻ ions.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how atoms bond with each other, influencing the formation of compounds.

Front

What type of compound is K₂O?

Back

K₂O is an ionic compound.

Front

What is the molar mass of pentanol (C₅H₁₁OH)?

Back

The molar mass of pentanol is 88 g/mol.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the relationship between ionic charge and ion size?

Back

Ionic charge affects ion size; more negative charge (more electrons) generally leads to a larger ion.

Front

What is the formula for the compound formed by sodium and oxygen?

Back

Na₂O

Front

How does nuclear charge affect ion size?

Back

A higher nuclear charge pulls electrons closer, resulting in a smaller ion size.

Front

What is the formula for calculating the mass of gold in a medal?

Back

Mass of gold = total mass of medal × (percentage of gold / 100).