Strontium and Nitride Compounds

The video tutorial explains how to write the formula for strontium nitride. It begins by identifying the element symbols for strontium (Sr) and nitrogen (N), noting that nitride indicates a single nitrogen atom. The tutorial discusses the ionic nature of the compound, highlighting the charges of strontium (2+) and nitrogen (3-). Using the crisscross method, the tutorial demonstrates how to balance these charges to derive the formula Sr3N2. The video concludes by verifying the formula through charge balance, ensuring a net charge of zero.

What is the symbol for strontium on the periodic table?

• Sn

• Sm

• St

• Sr

What does the 'ide' suffix in nitride indicate about the nitrogen atom?

• It is a polyatomic ion.

• It is a single atom.

• It is a diatomic molecule.

• It is a metal.

Which group does strontium belong to in the periodic table?

• Group 17

• Group 1

• Group 2

• Group 15

What is the ionic charge of nitrogen in nitride?

• 1-

• 3-

• 2-

• 4-

How do you balance the charges when writing the formula for strontium nitride?

• By changing the oxidation state of nitrogen.

• By using the crisscross method.

• By using a catalyst.

• By adding electrons to strontium.

What is the formula for strontium nitride derived using the crisscross method?

• Sr3N2

• SrN2

• Sr2N3

• SrN

How do the charges of strontium and nitrogen add up in the formula Sr3N2?

• They add up to zero.

• They add up to a negative charge.

• They add up to a positive charge.

• They do not balance.

What is the net charge of the compound strontium nitride?

• Positive

• Negative

• Undefined

• Zero

Why is it important to ensure the charges balance in an ionic compound?

• To increase its solubility.

• To ensure it is stable and neutral.

• To change its color.

• To make it reactive.