Why do all the elements in Group 16 share similar properties? A. They all have the same number of protons.
B. They all have electrons the same distances from their nuclei.
C. They all are in the same period of the periodic table.
D. They all have the same number of valence electrons.​

Which of these best describes an ionic bond?

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 element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)