If a frozen piece of metal is placed into a pot of boiling water, will the reaction be endothermic or exothermic, relative to the metal? (Heat flowing into the metal, or out of the metal). Explain.

they are both synthetic elements

explanation:

d

all eukaryotic cell have mitochondria : )

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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