Nickel and Sulfide Compounds

The video tutorial explains how to write the chemical formula for nickel 3 sulfide. It begins by identifying the element symbols for nickel and sulfur, then discusses the importance of considering ionic charges due to the metal and non-metal combination. The tutorial introduces the crisscross method to balance the charges and derive the formula Ni2S3. Finally, it verifies the formula by ensuring the net charge is zero, confirming the correct composition of nickel 3 sulfide.

What is the symbol for nickel when writing the formula for nickel 3 sulfide?

• Ni

• N

• Nk

• Nl

What charge does nickel have in nickel 3 sulfide?

• 2+

• 3+

• 4+

• 1+

Which group is sulfur in on the periodic table?

• Group 12

• Group 18

• Group 16

• Group 14

What is the charge of sulfur in nickel 3 sulfide?

• 4-

• 2-

• 1-

• 3-

What method is used to balance the charges in nickel 3 sulfide?

• Crisscross method

• Parallel method

• Cross method

• Diagonal method

What is the final formula for nickel 3 sulfide?

• NiS

• Ni2S3

• NiS2

• Ni3S2