In 1911, hans geiger and ernest marsden (working under ernest rutherford) conducted an experiment involving alpha particles and gold foil that led to the discovery of the nucleus in atoms. the nucleus of an atom accounts for.:
a-most of the size and mass of the atom.
b-very little of the size and mass of the atom.
c-most of the atom's size but very little of its mass.
d-most of the atom's mass but very little of its size.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Name the element in group 17, period 2. (periodic table)

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.