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Alona [7]
3 years ago
11

On the periodic table, what is used to determine the order of elements? (Use your own words? Help please!!!

Chemistry
2 answers:
Bezzdna [24]3 years ago
5 0

in periodic table, elements are arranged according to atomic number; beginning with Hydrogen at 1, Helium at 2 n so on. atomic number represents the no. of proton or electron each neutral element has.


Angelina_Jolie [31]3 years ago
4 0

Elements are listed in order of increasing atomic number from the left to the right.

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Calculate the percent ionization of propionic acid (C2H5COOH) in solutions of each of the following concentrations (Ka is given
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Answer:

a) = 0.704%

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Explanation:

Given that:

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Percentage Ionization(∝)  \alpha = \sqrt{\frac{K_a}{C} }

\alpha = \sqrt{\frac{1.34*10^{-5}}{0.270} }

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For Part B; where Concentration of B = 7.84*10^{-2 M

\alpha = \sqrt{\frac{1.34*10^{-5}}{7.84*10^{-2}} }

\alpha = \sqrt{1.709*10^{-4} }

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percentage% (∝) = 0.0130 × 100%

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For Part C; where Concentration of C= 1.92*10^{-2} M

\alpha = \sqrt{\frac{1.34*10^{-5}}{1.97*10^{-2}} }

\alpha = \sqrt{6.802*10^{-4}}

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= 2.60%

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The modern periodic table is arranged by increasing
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