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EastWind [94]
4 years ago
10

What does each period in the periodic table correspond to?

Chemistry
1 answer:
DedPeter [7]4 years ago
3 0
Each period corresponds to a principal energy level.
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vodka [1.7K]
Silicon has 14 protons and it should have at least 12 neutrons
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Please help me i’m struggling
Marrrta [24]

Answeeeeer:

 A. cell

Explanation:

Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.

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3 years ago
How many miles of a gas sample are in a 20.0 l container at 373kand 203 kpa? the gas constant is 8.31 l-kpa/m-k
ladessa [460]
To simplify our solution for this probelm we first assume that the gas we are dealing with is an ideal gas. Given that it is ideal we can proceed the solution using the formula: PV=nRT where P is pressure (203KPa), V is volume (20.0 L), n is moles (required), T is absolute temperature (373K) and R is the gas constant ( <span>8.31 l-kpa/m-k). Plug in the given to the respective variables and you should get 3.28 moles of the gas sample. </span>
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3 years ago
What happens when a nitrogen atom loses two electrons?
natita [175]
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6 0
3 years ago
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Iodine-131, t1/2 = 8.0 days, is used in the diagnosis and treatment of thyroid gland diseases. If a laboratory sample of iodine-
SashulF [63]

Answer:

32,0 days.

Explanation:

The radioactive decay follows:

N_{t} = N_{0}e^{\frac{-0.693t}{t_{1/2}}

Where Nt is the concentration in a time t (6,22x10¹⁷), N₀ is the initial concentration (9,95x10¹⁸) Half life time is 8,0 days and t is the time it take to drop this concentration. Replacing:

6.22x10^{17} = 9,95x10^{18}e^{\frac{-0.693t}{8 days}

0,0625 = e^{\frac{-0.693t}{8days}

ln 0,0625 = {\frac{-0.693t}{8days}

-2,77*8days = -0.693t

-22,2days = -0.693t

32,0days = t

It take <em>32,0 days</em>

<em></em>

I hope it helps!

7 0
3 years ago
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