The reason as for why there are decimal values for atomic mass values, is because, it is the average of all of the possible atomic masses that can be formed and or present, by taking varying number of neutrons. This varying number of neutrons causes different mass values to be present and by taking the average of the atomic masses, from all possible isotopes, the value yields an average or approximate atomic mass based on all of the atomic masses formed from their unique number of neutrons.
Electrons are not included as they are not found within the nucleus of the atom, for which the atomic mass value can be obtained. They are found outside the Nucleus, within orbitals, of regions of space.
Answer:
In Addition To Its Oxidizing Abilities, The Hypochlorite Ion Has A Relatively High Affinity For ... It is also the active ingredient that forms when swimming pool water is treated with chlorine.
Answer:
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Answer:
(b) gas and dust
Explanation:
"The interstellar medium is the stuff between the stars. Made up mostly of hydrogen and helium gas – plus trace amounts of ices, silicate grains, and all the other elements – it contains all the material needed to make stars and planets. It is shaped by stellar winds, dying stars, galactic magnetic fields, and supernova explosions."
"The interstellar medium is filled primarily with hydrogen gas. A relatively significant amount of helium has also been detected, along with smaller percentages of such substances as calcium, sodium, water, ammonia, and formaldehyde . Sizable quantities of dust particles of uncertain composition are present as well."