Combination or Synthesis Reaction. A combination of synthesis reaction is one. where a new product is synthesized by combination of two or three reactants.
Decomposition Reaction
Displacement or Replacement Reaction
Acid Base Reaction
Combustion Reaction
Answer:
Selenium has 36 valence electrons.
Answer:
i would say A-B
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The mass would be 28. The mass of an atom equals the number of neutrons and protons added together. In this case, they do not say the protons. But we must use our inside knowledge to know that the number of protons equals the number of electrons. Thus, your number of protons would be 13
Petroleum stores energy from the sun and is carbon based, this characteristics make it a valuable resource.
<u>Explanation:</u>
Petroleum, a non-renewable fossil fuel has been in great demand as it makes transportation faster. Also we can convert petroleum to different types of liquefied petrol, gasoline and other igniting agents.
Fossil fuels are valuable energy sources because they contain hydrocarbon and other carbon-based materials. From light into heat into electricity, the energy saved with coal and oil arises from the sun, as they arose as plants and animals.
Along with being used as igniting agent, petroleum can also be used for generation of electricity, washing clothes in dry wash, as a lubricant in some of the automobile parts. Also it is used in sports equipment, manufacturing machines as lubricants, carpeting and other every day uses are there for petroleum.