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iren [92.7K]
3 years ago
14

Are Elements on the Period Table of Elements? Yes or No?

Chemistry
2 answers:
Scilla [17]3 years ago
5 0

Answer:

Yes it is

Hope it helps

spin [16.1K]3 years ago
3 0

Answer:

Yes they are I guess so

:)

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What scientific instrument is sensitive enough to detect a planet transiting a star?
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The correct scientific instrument is telescope.
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What changes in space result from the death of massive stars?
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Whenever the fuel is being used up, a star explodes and the energy leakage from a star's core ceases.

Explanation:

The dying star expands in the "Red Giant," before even the inevitable collapse starts, due to nuclear reactions just outside of the core.

It becomes a white dwarf star when the star has almost the same density as the Sun. If it's much larger, a supernova explosion could take place and leave a neutron star away. However, if it is very large–at least three times the Sun's mass–the crumbling core of the star, nothing will ever stop it from crumbling. The star is imploding into a black hole, an endless gravitational loop in space.

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3 years ago
Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04
evablogger [386]

Answer:

16.6 mg

Explanation:

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We know the half-life is t1/2 = 8.04 day. We can calculate the rate constant using the following expression.

k = ln2 / t1/2 = ln2 / 8.04 day = 0.0862 day⁻¹

Step 2: Calculate the mass of iodine after 8.52 days

Iodine-131 decays following first-order kinetics. Given the initial mass (I₀ = 34.7 mg) and the time elapsed (t = 8.52 day), we can calculate the mass of iodine-131 using the following expression.

ln I = ln I₀ - k × t

ln I = ln 34.7 - 0.0862 day⁻¹ × 8.52 day

I = 16.6 mg

8 0
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Vegetarian diets can provide high levels of antioxidants and a lipid profile that can help prevent coronary disease. However, th
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8 0
3 years ago
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Write 4.13X10^3 in decimal notation.
alukav5142 [94]

Answer:

4.13X10^3= 4130 in the expanded form

4 0
3 years ago
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