To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.
Answer:
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Answer:
a. True
Explanation:
Alkanes are chains of carbon atoms surrounded by hydrogen atoms. TRUE.
Alkanes are hydrocarbons, that is, they are organic compounds formed only by carbon and hydrogen. In alkanes, carbon atoms are bonded to each other through single covalent bonds and they are also bonded to hydrogen atoms through the same type of bonds. Alkanes have the general formula CnH2n+2.
There's a heck ton of snow! What does that mean? It means metals that may not be water-soluble can rust. <span />