Bonding and Reactions

Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the little “₂” tell you?

• Bromide has a 2- charge
• There are 2 magnesium ions for every 1 bromide ion
• There are 2 bromide ions for every 1 magnesium ion

The diagram represents which type of bond?

• ionic bond
• covalent bond
• metallic bond

The diagram represents which type of bond?

• ionic bond
• covalent bond
• metallic bond

The compound NaCl is an example of . . .

• an ionic compound
• a covalent compound
• a metallic compound

What types of elements form covalent bonds?

• metals
• nonmetals
• metalloids
• metals and nonmetals

What element's atom could this diagram represent?

• lithium (Li)
• magnesium (Mg)
• carbon (C)
• oxygen (O)

Which of the following correctly describes this chemical equation in words?: H₂ + Cl₂ --> 2HCl

• 1 molecule of hydrogen gas reacts with 1 molecule of chlorine gas to yield 2 molecules of hydrochloric acid
• 2 molecules of hydrogen gas react with 2 molecules of chlorine gas to yield 2 molecules of hydrochloric acid
• 2 hydrogen atoms react with 2 chlorine atoms to yield 2 hydrogen atoms and 1 chlorine atom

During a chemical reaction . . .

• chemical bonds break or form
• matter is destroyed