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Aliun [14]
3 years ago
14

If a metal changes color over time from exposure to air, what has likely occurred?

Chemistry
1 answer:
natita [175]3 years ago
3 0

Answer:

Option A. a chemical change

Explanation:

A chemical change is a change in which new substance is formed and can not be easily reversed. A change of metal color when exposed to air for a long time is simply called rusting. This is a chemical change as new substance is formed. This can be seen when Zn roofing sheets changes color over time on exposure to air.

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Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words, isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.

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4 years ago
What is the wavelength of electromagnetic radiation with a frequency of 9.23 × 107 Hz?
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Answer:

The wavelength of the given electromagnetic radiation is 3.25 m.

Explanation:

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f = 9.23 \times10^{7}  Hz,

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