F là phi kim mạnh nhất.
Li là kim loại có độ âm điện lướn nhất.
He là nguyên tử có bán...
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State one important difference between a physical change and a chemical change?
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What if it is did darwin used to support his theory of evolution
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An unknown substance has been shown to have weak covalent bonds. which of the following is most likely a property of this substance? a. high ph b. high conductivity c. low melting point d. low flammability
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