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291.
What is the chemical symbol for silver?
Explanation:
292.
Which subatomic particle carries no electric charge and is found in the nucleus of an atom?
Explanation:
293.
What is the chemical formula for sulfuric acid, a strong mineral acid?
294.
What is the term for a substance composed of two or more different elements chemically combined in a fixed ratio?
Explanation:
295.
What is the chemical formula for methane, a common component of natural gas?
Explanation:
296.
Which gas is commonly used as a fuel for vehicles and is a major component of natural gas?
Explanation:
297.
What is the chemical formula for hydrogen peroxide, a common disinfectant and bleaching agent?
298.
Which gas is responsible for the "ozone layer" in the Earth's atmosphere and helps protect against ultraviolet (UV) radiation?
Explanation:
299.
What is the term for a substance that undergoes a chemical change in a reaction and is located on the left side of a chemical equation?
Explanation:
300.
Which element is commonly used as a refrigerant and has the atomic number 9?