Explanation:

Potassium iodide (KI) develops an ionic bond. Potassium and also iodine have very different electronegativities. The 2 atoms would kind an ionic bond since ionic bonds type between atoms v a huge difference in electronegativity (difference>1.7 using the Pauling scale will result in an ionic bond). 


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Correct answer:


Explanation:

Ionic bonds are bonds in which there is a complete transfer that electrons between two elements. They space formed in between two elements with a huge difference in electronegativity, like a metal and also nonmetal. Molecules with comparable electronegativities share their electrons and form covalent bonds.

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Because bromine has a much higher electronegativity 보다 potassium, it will fully take one electron native potassium to kind a finish octet, leave potassium likewise with a complete octet.

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, and 
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all kind covalent bonds and share electrons in between the atoms of the molecule.


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Example concern #3 : Compounds, Molecules, and Bonds


The electronegativities of specific elements are offered below:

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Which that the following compounds is most ionic in character?

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Possible Answers:
Correct answer:

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Explanation:

The level of ionic character of a compound is identified by to compare the electronegativities the the species involved. The better the distinction in electronegativity, the more ionic the compound.

Here the best arithmetic difference is found in yttrium trichloride.

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Example concern #1 : Compounds, Molecules, and Bonds


Which of the complying with is the correct surname for the compound 

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 ?


Possible Answers:

Potassium monoxide


Dipotassium monoxide


Potassium (I) oxide


Potassium (II) oxide


Potassium oxide


Correct answer:

Potassium oxide


Explanation:

The compound 

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 contains a metal (potassium) and a nonmetal (oxygen), so that is one ionic compound, through no transition metals. To surname an ionic compound, the complying with rules apply:

- the steel component"s name does not change, regardless of quanitiy or charge

- the non-metal component"s surname ends in -ide, and has no prefix 

- if the metal is a transition metal, the metal"s charge is stated with a roman numeral

Using this rules, the correct name is potassium oxide.


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Example concern #5 : Compounds, Molecules, and also Bonds


Which of the following most accurately explains an ionic bond?


Possible Answers:

An attractive pressure exists in between two atom that have one or an ext of the very same electrons in valence shells.


An attractive pressure exists between a cation, which has obtained electrons, and also an anion, which has actually lost electrons.


Positive and an adverse poles kind on a molecule that is do of 2 nonmetals with various electronegativities.


An attractive force exists between a cation, which has actually lost electrons, and an anion, i m sorry has acquired electrons.


Correct answer:

An attractive force exists in between a cation, which has actually lost electrons, and also an anion, i m sorry has gained electrons.


Explanation:

An ionic link is one electrostatic force in between a positively fee cation (formed once electrons are lost) and also a negatively charged anion (formed when electrons space gained). When one answer an option mentions positive and also negative, it is actually a description of a polar covalent bond. The easiest means to identify this is the reality that it specifies a bond between two nonmetals. A steel in generally a component of one ionic compound.


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Example question #6 : Compounds, Molecules, and Bonds


Which of the statements are true around ionic compounds?


Possible Answers:

They are created by molecules the equally re-publishing electrons


They room non-polar


Water is an instance of an ionic compound


They space 3D arrays of charged molecules


Correct answer:

They are 3D arrays of charged molecules


Explanation:

Ionic compounds room made the atoms that are organized together through ionic bonds. This bonds allow charged particles that have an extremely different electronegativities come stick together, forming 3D crystals. For example, potassium and bromine form potassium bromide, one anti-convulsant. The electrons room shared an extremely disproportionately in between the positive and also negatively charged particles, through the all the electrons located on the much more electronegative atom. Ionic compounds space not non-polar since non-polar is provided to define a molecule vice versa, ionic compounds are not molecules. Water is an instance of a polar molecule however is not an ionic compound since The hydrogens and also oxygen share their electrons.

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Example concern #1 : Compounds, Molecules, and also Bonds


Diffusion deserve to be identified as the net carry of molecules under a gradient of differing concentrations. This is a passive and also spontaneous procedure and depends on the random activity of molecules and Brownian motion. Diffusion is crucial biological process, particularly in the respiratory system where oxygen diffuses from alveoli, the basic unit that lung mechanics, to red blood cells in the capillaries.

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Figure 1 depicts this process, reflecting an alveoli separated from bordering cells by a capillary v red blood cells. The partial pressures of oxygen and carbon dioxide space given. One such equation supplied in determining gas exchange is Fick"s law, offered by:

ΔV = (Area/Thickness) · Dgas · (P1 – P2)

Where ΔV is circulation rate and area and also thickness describe the permeable membrane through which the gas passes, in this case, the wall of the avlveoli. P1 and P2 refer to the partial pressure upstream and downstream, respectively. Further, Dgas­, the diffusion constant of the gas, is characterized as: