Lily and Evelyn are studying chemistry and they come across a problem. They need to determine the charge on the calcium ion in a chemical reaction. What would be the charge?

Avery, Charlotte, and Scarlett are working on a chemistry project about common compounds. They came across a compound named barium hydride. Can you help them figure out the correct formula for barium hydride?

Noah and Rohan were in a chemistry lab. They found a compound labeled as CuCO₃. Can you help them to name this compound?

Ava, Avery, and Priya are in a chemistry lab. They are given a compound and asked to identify it. The compound is Phosphorous trichloride. Which of the following is the correct chemical formula for the compound?

During a chemistry class, Evelyn and Scarlett came across a formula, KNO₃, written on the blackboard. Daniel, their classmate, asked them if they knew the name of this formula. Can you help them answer Daniel's question?

Henry, Grace, and Evelyn are in a chemistry lab. They come across a compound labeled as 'LiOH'. They start discussing what it could be. Henry suggests it's 'lithium hydrogen oxide', Grace thinks it's 'lithium hydroxide', Evelyn believes it's 'lithium monohydroxide', and there's also a possibility that it could be 'lithium oxide'. What is the correct name of the compound?

Rohan is studying chemistry and he came across a chemical formula NO₂. He asked Mia and Priya about it. Can you help them identify what NO₂ stands for?

Harper and Jackson are working on a science project. They need to create a bond between two nonmetals. What kind of bond should they form?

During a chemistry experiment, Harper and Mason were asked to identify the formula for hydrochloric acid. What formula did they identify?