CC5/6/7 Types of bonding

What happens when a calcium atom forms an ion with a 2+ charge?

• The atom gains two protons

• The atom loses two electrons

• The atom gains two electrons

What kind of ions are usually formed by metals?

• Positive ions (Cations)

• Negative ions (Anions)

• Positive or negative ions

Which of the following atomic structures represents a positive ion?

• 9 protons,10 neutrons, 10 electrons

• 12 protons, 14 neutrons, 12 electrons

• 12 protons, 12 neutrons, 10 electrons

What happens when sodium and chlorine atoms form sodium chloride?

• An electron transfers from each sodium atom to each chlorine atom

• An electron transfers from each chlorine atom to each sodium atom

• Sodium and chlorine atoms share electrons

What is the electronic configuration of the fluoride ion (charge = 1-) made from a fluorine atom with an atomic number of 9 and a mass number of 19?

• 2.8.8.2

• 2.6

• 2.8

Why do ionic compounds usually have high melting points?

• The ions are arranged in a very regular pattern

• The electrostatic forces between the ions are very strong

• The ions are very heavy

When does magnesium chloride conduct electricity?

• Only when solid

• Only when molten or dissolved in water

• When solid and when dissolved in water

What kind of structure is formed in solid potassium chloride?

• Large molecules

• Giant ionic lattice

• Groups of two ions in pairs

What will be the formula of an ionic compound formed from calcium and oxygen?

• CaO

• CaO₂

• Ca₂O

Which of the following compounds contains three elements (metal, nonmetal and oxygen)?

• Sodium chloride

• Sodium oxide

• Sodium chlorate