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Q: What is the name of an element with a different number of neutrons? Read this paragraph and choose the correct option from the provided answers: All atoms of the same element have the same number of protons, but some may have different numbers of neutrons. For example, all carbon atoms have six protons, and most have six neutrons as well. But some carbon atoms have seven or eight neutrons instead of the usual six. Atoms of the same element that differ in their numbers of neutrons are called isotopes . Many isotopes occur naturally. Usually one or two isotopes of an element are the most stable and common. Different isotopes of an element generally have the same physical and chemical properties. That's because they have the same numbers of protons and electrons. For a video explanation of isotopes, go to this URL:. Choices: - mineral - reaction - solution - isotope A:
(Answer)
isotope

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Q: What is an interesting example of a molecule with two central atoms, which are both c atoms? Read this paragraph and choose the correct option from the provided answers: Acetylene is an interesting example of a molecule with two central atoms, which are both C atoms. Polyatomic ions are bonded together with covalent bonds. Because they are ions, however, they participate in ionic bonding with other ions. So both major types of bonding can occur at the same time. Choices: - chloride - water - sulfur - acetylene A:
(Answer)
acetylene

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Q: What produces the centripetal force to keep the earth orbiting the sun? Read this paragraph and choose the correct option from the provided answers: Centripetal force is, simply, the force that causes centripetal acceleration. Objects that move in uniform circular motion all have an acceleration toward the center of the circle and therefore, they must also suffer a force toward the center of the circle. That force is the centripetal force. For orbiting satellites, such as the moon orbiting the earth or the earth orbiting the sun, the centripetal force is produced by gravity. When an Olympic hammer thrower whirls a massive ball on a chain, the centripetal force is created by the athlete and transmitted by the chain. Choices: - heat - motion - weight - gravity A:
(Answer)
gravity