Which group of diamagnetic transition metals trends in density and melring points that don't match the same trends seen in the groups?

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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~ trueboss72

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest