Strontium Phosphide Ionic Compounds

The video tutorial explains how to write the formula for strontium phosphide. It begins by identifying the element symbols for strontium (Sr) and phosphide (P). The tutorial then discusses the ionic charges of strontium (2+) and phosphorus (3-) and explains how to balance these charges using the crisscross method. Finally, the video verifies the formula Sr3P2 by ensuring the net charge is zero, confirming the correctness of the formula.

What is the symbol for strontium?

• Sn

• Sm

• Sr

• St

What does the suffix 'ide' in phosphide indicate?

• A molecule

• A single element

• A compound

• A mixture

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

• To make it stable

• To make it dissolve in water

• To make it reactive

• To make it colorful

What is the ionic charge of strontium?

• 4+

• 3+

• 2+

• 1+

Which method is used to balance the charges in strontium phosphide?

• Crisscross method

• Cross-multiplication

• Substitution method

• Addition method

What is the formula for strontium phosphide after applying the crisscross method?

• SrP

• SrP2

• Sr2P3

• Sr3P2

How do you verify the formula for strontium phosphide?

• By checking the smell

• By checking the net charge

• By checking the taste

• By checking the color

What is the net charge of a correctly balanced ionic compound?

• Positive

• Negative

• Zero

• Variable