A polyatomic ion is seen as a molecule that has been ionized by gaining or losing electrons. In a polyatomic ion, the group of covalently bonded atoms carries a net charge because the total number of electrons in the molecule is...
Questions: 10 | Attempts: 49291 | Last updated: Aug 26, 2021
What is the name of this chemical? NH4+
Physical changes only change a substance's appearance, whereas chemical changes are the change of a substance into an entirely new chemical formula. Can you differentiate between physical and chemical changes?
Questions: 10 | Attempts: 8585 | Last updated: Mar 19, 2021
Cooking an egg.
This quiz can be used as a pre-test for a unit on atoms, molecules, elements, and compounds. The quiz will, along with a post-test, serve as a method to determine how much the students have learned after the science unit has been...
Questions: 10 | Attempts: 40080 | Last updated: Jun 23, 2020
All matter consists of particles called________________.