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Karo-lina-s [1.5K]
3 years ago
8

Where are the most reactive nonmetal elements found on the periodic table?

Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
6 0

Answer is: group 17 on the periodic table.

Group 17 (halogens) elements are: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I).

They are very reactive and easily form many compounds.  

Fluorine and chlorine are in gaseous state, bromine is liquid and iodine is in solid state in room temperature.

Halogens need to gain one electron to have electron cofiguration like next to it noble gas.

For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.  

bazaltina [42]3 years ago
6 0
At the top of group 17.
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Explain why energy sources do not have 100% efficiency. Why do you think some have lower efficiencies?
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Answer:

Energy sources do not have 100% efficiency because <em>the processes of energy conversion to usable forms involves energy losses. </em>

Some have lower efficiencies due to; <u>energy losses in form of heat</u> during conversion, <u>poor technology applied during conversion</u> of energy and<u> lack of desire equipment</u> to use in the energy conversion system.

Explanation:

The desired form of energy for use is derived from conversion of energy from the source using an energy converter into another form which is usable. The efficiency of the energy converter is calculated as;

л = output energy/input energy

The efficiency of energy is limited to the cost of equipment required for conversion from energy source by the energy converter to a form which is usable. Additionally, because energy sources are scarce, the technology to use in energy  conversion is a factor affecting energy efficiency in that high efficiency will require advanced technology with better equipment leading higher costs of that energy form. when heat losses are involved during energy conversion, efficiency lowers, thus its better if such losses are used as energy input in another system.

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3 years ago
Someone please help! I will give Brainliest to who answers the best! Write an explanation of how mass determines (or affects) th
xxTIMURxx [149]
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Glad to help! :) :D

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Why mango becomes yellow when ripe​
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Write an equation to show how perchloric acid, HClO4, reacts with water. Include states of matter in your answer. Click in the a
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Answer:

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HClO4(aq) + H2O(l) ⇄ H3O+(aq) + ClO4-(aq)

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