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3 years ago

Each row in the periodic table corresponds to one energy level in an atom. True Or False ?

2 answers:

8 0

For the answer to the question above asking, e<span>ach row in the periodic table corresponds to one energy level in an atom.

The answer is true.

I hope my answer helped you. Feel free to ask more questions. Have a nice day!</span>

777dan777 [17]3 years ago

7 0

Answer:

True

Explanation:

Let's take examples. Hydrogen and helium are in the first row because they have a total of one energy levels each due to the configuration of H: 1 and He: 2.

Sodium is in period three because that it has three energy levels carrying atoms. Look at the following configurations

Na:2, 8, 1. S: 2,8,6 . Both elements are in period/row three and they both have three energy levels

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The mass of C02 contains same number of molecules as there are number of atoms in 2.3 g of sodium

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3 years ago

A river with a flow of 50 m3/s discharges into a lake with a volume of 15,000,000 m3. The river has a background pollutant conce

spin [16.1K]

Explanation:

The given data is as follows.

Volume of lake = $15 \times 10^{6} m^{3}$ = $15 \times 10^{6} m^{3} \times \frac{10^{3} liter}{1 m^{3}}$

Concentration of lake = 5.6 mg/l

Total amount of pollutant present in lake = $5.6 \times 15 \times 10^{9} mg$

= $84 \times 10^{9}$ mg

= $84 \times 10^{3}$ kg

Flow rate of river is 50 $m^{3} sec^{-1}$

Volume of water in 1 day = $50 \times 10^{3} \times 86400 liter$

= $432 \times 10^{7}$ liter

Concentration of river is calculated as 5.6 mg/l. Total amount of pollutants present in the lake are $2.9792 \times 10^{10} mg$ or $2.9792 \times 10^{4} kg$