What happens when a wave hits an object?

Chemistry

1 answer:

pshichka [43]2 years ago

8 0

Answer: the wave is reflected
explaination: in which, reflected stately happens when a wave strikes an object

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what kind of evidence indicates a chemical change ?... a physical change? you may use examples to show softened.

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Some things that can indicate a chemical change are change of odor, change of color, change in temperature or energy, such as the production or loss of heat. An example could be the rusting of metal, there would be a color change of going from a shiny silver to a dirty, splotchy red color. Some things that indicate a physical change are change of appearance like change of shape, etc. It can also be like a change between a solid to liquid to gas. For example, the cutting of a piece of paper.

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What is the identity of the element, and how many neutrons does it have? An elements most stable ion forms an ionic compound wit

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B. CA, 14

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Atoms of elements contain small particles known as electrons, neutrons, and protons. The nucleus of an atom is made up of neutrons and protons which are at the center of the atom. Electrons on the other hand surrounds the nucleus. Electron has negative charge while proton has a positive charge. The number of neutrons is equivalent to the number of protons . In addition, the number of protons is equal to mass number minus the number of electrons.

For the compound $XCl_{2}$ , it can be broken down into $X^{2+}$ and $2Cl^{-}$ . Its ion has a mass of 34 and 18 electrons which means it has already lost 2 electrons.