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The correct answer is letter (d.) Mg, Ca, Sr, Ba
These four elements are found in Group 2 of the periodic table, which are alkaline metals, therefore they have the very similar properties because of their 2 valence electrons, which makes them reactive.
Answer:
the additional concentration of nitrogen = 0.04748 mg/L
Explanation:
From the given information:
The mass of the nitrogen added to the field per year = 10% of 1300.0 kg
= ![\dfrac{10}{100} \times 1300](https://tex.z-dn.net/?f=%5Cdfrac%7B10%7D%7B100%7D%20%5Ctimes%201300)
= 130 kg
The mass of the nitrogen that is being also washed into the river
= 15% of 130 kg
= ![\dfrac{15}{100} \times 130](https://tex.z-dn.net/?f=%5Cdfrac%7B15%7D%7B100%7D%20%5Ctimes%20130)
= 15 × 1.3 kg
= 19.5 kg /year
Converting kg/year into milligram per seconds; we have:
![\dfrac{19.5 \times 10^6 \ mg}{365 \times 3600\times24 \ seconds }](https://tex.z-dn.net/?f=%5Cdfrac%7B19.5%20%5Ctimes%2010%5E6%20%5C%20mg%7D%7B365%20%5Ctimes%203600%5Ctimes24%20%5C%20seconds%20%7D)
= 0.61834 mg/seconds
If the river flows at an average rate of 0.460 cubic feet
Let's convert the cubic feet into liters
we all know that;
1 ft = 0.33 meter
1 cubic feet = 28.31 liters
∴ 0.460 cubic feet = 0.460 × 28.31
13.0226 liters
Finally, the additional concentration of nitrogen = ![\dfrac{0.61834}{13.0226 }](https://tex.z-dn.net/?f=%5Cdfrac%7B0.61834%7D%7B13.0226%20%7D)
the additional concentration of nitrogen = 0.04748 mg/L
Answer:
The answer to your question is: Al, Si have the greatest and S, C have the smallest.
Explanation:
Atomic radius increases from right to left in the periodic table.
Atomic radius increases from the upper section to the lower section of the periodic table.
Order of the atomic radius from highest to lowest.
Al, Si, S and C
One oxygen atom shares two electron with two hydrogen atoms in this way water molecules are formed. The bond between oxygen and hydrogen is covalent bond.
<h3>What is covalent bond ?</h3>
An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs.
Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.
According to the amount of shared electron pairs, there are three different forms of covalent bonds. single covalent bond is one type of covalent bond. covalent double bond and covalent triple bond.
Thus, option B is correct .
To learn more about covalent bond follow the link ?
brainly.com/question/10777799
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