A scalar quantity is a measurement of a quantity, like temperature, or mass.
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Elements in Group 14 could lose four, or gain four electrons to achieve a noble gas structure. In fact, if they are going to form ions, Group 14 elements form positive ions. Carbon and silicon form covalent bonds. Carbon's millions of organic compounds are all based on shared electrons in covalent bonds.
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The <u>nucleus</u> is the core of an atom.
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That's just how it is.
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Nuclear fusion produces elements that are heavier than helium.
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