13. Which best describes the transition from gas to liquidy (2 points)
Energy must be removed because particles in liquid move more slowly
Energy must be added because particles in liquid move more quickly
O Energy is neither added nor removed in this phase transition
O Energy is either removed or added, depending on the type of particles

Energy must be removed because particles in liquid move more slowly. This statement best describes the transition from gas to liquid.

Option A

Explanation:

The process of transferring from gas to liquid is termed as condensation. It requires the release of energy from the gas molecules to condense them as liquid. Gas molecules inherit large amount of energy in order to move fast as the particles of gas moves faster compared to liquid.

Thus, the extra energy need to be released before converting it to liquid which has particles having less velocity of particles. So the statement describing the transition from gas to liquid is that the energy must be removed because the particles in liquid move more slowly.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

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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