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german
3 years ago
15

Most elements occur in nature as a single isotope. TRUE FALSE

Chemistry
2 answers:
cestrela7 [59]3 years ago
8 0

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

lubasha [3.4K]3 years ago
4 0

Answer:

FALSE

Explanation:

in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.

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3 years ago
Which of the following shows the wavelengths of light that an atom gives off when an electron falls to a lower energy level?
charle [14.2K]

The wavelengths of light that an atom gives off when an electron falls to a lower energy level corresponds to Emission spectrum , Option D is the correct answer.

<h3>What is Emission Spectrum ?</h3>

Light is absorbed or emitted when an electron jumps or falls into an energy level.

The energy of light absorbed or emitted is equal to the difference between the energy of the orbits.

Therefore , the wavelengths of light that an atom gives off when an electron falls to a lower energy level corresponds to Emission spectrum.

To know more about Emission Spectrum

brainly.com/question/13537021

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2 years ago
11. If you weight 60 lbs on Earth, you would weigh<br> moon
DochEvi [55]

Answer:

about 10 pounds

Explanation:

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6 0
4 years ago
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umka21 [38]

Answer:

Noble gases

Explanation:

nobles gases have their outer energy level complete

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What physical properties can be used to separate heterogeneous mixture's?
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Evaporation, distillation, filtration and chromatography
Hope it help you, have a nice day
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