Part 1: Potassium, and Rubidium.Part 2: Calcium has 20 protons and 20 electrons because the atomic number for calcium is 20 and that determines how many protons there are and in an atom, the number of protons is the same number of electrons. Calcium has about 20 neutrons. I got the number of Neutrons by subtracting the mass number(40.078) and the atomic number(20), I got 20.078. Round to the nearest whole number because you cannot have half or partial neutron. So, Calcium has 20 protons, 20 electrons, and 20 neutrons,
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14 protons, a non-metal, a neutral carbon would have 4 valence electrons (don’t add things to do with its mass or charge, as it’s not finite)
Answer is: <span>main products of the combustion of methane and other fossil fuels are carbon(IV) oxide and water.
</span>Balanced chemical
reaction of combustion of methane:
CH₄ + 2O₂ → CO₂ + 2H₂<span>O.
</span>In this combustion reaction, carbon is oxidized (from -4 to +4 oxidation number) and oxygen is reduced (from 0 to -2 oxidation number).
According to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space.
<h3>What are heat pumps?</h3>
It is characterized by being a thermal machine or a device based on thermodynamics that, through an absorption process, takes heat from one place and transfers it to another, that is, it extracts heat from a cold source to a hot one.
An air-to-air heat pump starts by sucking in outside air or recovers heat from outside and transfers it to a higher temperature level in the ambient air, raising the temperature of the room, being adjustable to adapt to the heating needs of the conditioned space.
Therefore, we can conclude that according to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space..
Learn more about heat pumps here: brainly.com/question/1081420
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