Science Science Cycle 1 LearningOh 40m 3sLeftWhat is the charge /valency on positive and negative ion in CaCO3?a) +2 -1b) +2 -2c) +1 -2d) +1 -1Q9. OPTIONS:ABco doo

Science Science Cycle 1 LearningOh 40m 3sLeftWhat is the charge /val

1.	Science Science Cycle 1 LearningOh 40m 3sLeftWhat is the charge /valency on positive and negative ion in CaCO3?a) +2 -1b) +2 -2c) +1 -2d) +1 -1Q9. OPTIONS:ABco doo
Answer» I don't UNDERSTAND that