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marusya05 [52]
3 years ago
6

Why do atoms share electrons in covalent bonds?

Chemistry
2 answers:
vladimir2022 [97]3 years ago
7 0
To fill the other element's shell.
Mrac [35]3 years ago
4 0

Answer:

<em>Atoms share electrons</em> in <em>covalent bonds</em> because in this way both atoms attain the more stable configuration of a noble gas (complete valence shell).


Explanation:

Covalents bonds are the chemical bonds that result when <em>two atoms share </em>the <em>electrons</em> of the valence shell (the outermost shell of the atoms).


The shared electrons may be count as belonging to the two atoms that form the bond, and so both atoms will gain the electrons that permit them to complete the 8 electrons in their outermost shell, which is the most stable configuration of the noble gases (2 in the special case of hydrogen and helium). This is the so called octet rule.


The covalent bonds are possible between elements that are close in the periodic table, meaning that their electronegativitiies are similar, and are typical of non-metal elements.


When two or more atoms are bonded by covalent bonds they form a molecule. Some examples of molecules formed by pure covalent bonds are: diatomic hydrogen, diatomic chlorine, and diatomic sulfur.


Since one atom of chlorine has 7 valence electrons it needs one additional electron to complete the 8 electrons (octet rule). Hence, two atomos of chlorine  may share one electron each, and so both atoms will count 8 electrons in the outermost shell, gaining stabilization both.

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Compute 4.659×104−2.14×104. Round the answer appropriately.
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When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 20.4 g g of carbon were burned in the presence
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Answer:

C + O2 -> CO2

C 20.4/12 = 1.7

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Compound B contains 92.31% carbon and 7.69% hydrogen. Determine the empirical formula of B​
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3 years ago
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A 30.5 g sample of an alloy at 95.0°C is placed into 49.3 g water at 24.3°C in an insulated coffee cup. The heat capacity of the
user100 [1]

Answer:

0.752 J/g*K

Explanation:

The heat lost by the alloy (which is negative) must be equal to the heat gained by the water and the coffee cup:

-Qa = Qw + Qc

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Where, m is the mass, c is the specific heat capacity, C is the heat capacity of the coffee cup, ΔT is the change in temperature, a represents the alloy, and w the water.

The coffee cup has initial temperature equal to the water, then:

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ca = 0.752 J/g*K

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3 years ago
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