The correct answer is C because in pond water there are little critters.
Which has the highest electronegativity value?
A
hydrogen
B
calcium
C
helium
D
fluorine d because fluorine has a higher group number
The average atomic mass of hydrogen (99% H-1, 0.8% H-2, and 0.2% H-3) is 1.012 amu.
The average atomic mass of hydrogen can be calculated with the following equation:
![A = m_{H-1}\%_{H-1} + m_{H-2}\%_{H-2} + m_{H-3}\%_{H-3}](https://tex.z-dn.net/?f=%20A%20%3D%20m_%7BH-1%7D%5C%25_%7BH-1%7D%20%2B%20m_%7BH-2%7D%5C%25_%7BH-2%7D%20%2B%20m_%7BH-3%7D%5C%25_%7BH-3%7D%20)
Where:
: is the mass of protium (H-1) = 1
: is the <em>mass</em> of deuterium (H-2) = 2
: is the <em>mass </em>of tritium (H-3) = 3
: is the abundance percent of H-1 = 99%
: is the <em>abundance percent</em> of H-2 = 0.8%
: is the <em>abundance percent</em> of H-3 = 0.2%
The average atomic mass is:
![A = 1*99\% + 2*0.8\% + 3*0.2\%](https://tex.z-dn.net/?f=%20A%20%3D%201%2A99%5C%25%20%2B%202%2A0.8%5C%25%20%2B%203%2A0.2%5C%25%20)
Changing all the <u>percent values</u> into <u>decimal ones</u>, we have:
![A = 0.99 + 2*0.008 + 3*0.002 = 1.012](https://tex.z-dn.net/?f=%20A%20%3D%200.99%20%2B%202%2A0.008%20%2B%203%2A0.002%20%3D%201.012%20)
Therefore, the average atomic mass of hydrogen is 1.012 amu.
Learn more about average atomic mass here brainly.com/question/8575403?referrer=searchResults
I hope it helps you!
A. 8,330 --> 8.33 × 10^3
B. 83.3 --> 8.33 × 10^1
C. 0.00833 --> 8.33 × 10^-3
D. 0.0833 --> 8.33 × 10^-2
E. 83,330 --> 8.33 × 10^4
Hope this helps!