Which of these the ignite from the sun to reach earth through the vacuum of space? (a) transverse waves which travel with different speeds (b) longitudinal waves which travel which travel with different speeds (c) changing amplitude and frequency of compressions (d) changing magnetic and electric fields applied at right angles

the answer is

Explanation:

D. changing magnetic and electric fields applied at right angles

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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