you didn't have any options to choose but I would describe the atmosphere as <span>the envelope of gases surrounding the earth or another planet.</span>
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what do you need help on there no question
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The number of protons in the nucleus of an atom is equal to the atomic number
the number of electrons in a neutral atom is equal to the number of protons
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They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
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Hope this helps luv
Yes this statement is true