1. which of the following occurs in an ionic bond?
•oppositely charged ions attract.
•two atoms share two electrons.
•two atoms share more than two electrons.
•like-charged ions attract.

2. which pair of elements is most likely to form an ionic bond?
•hydrogen and helium
•lithium and potassium
•potassium and iodine
•iron and zinc

3. ionic compounds are normally in which physical state at room temperature?
•solid
•liquid
•gas
•plasma

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.

Which of the following are correct values for the ideal gas laws constant r