Explanation:

Potassium iodide (KI) forms an ionic bond. Potassium and also iodine have really different electronegativities. The two atoms would kind an ionic bond due to the fact that ionic bonds kind between atoms through a huge difference in electronegativity (difference>1.7 utilizing the Pauling scale will an outcome in an ionic bond). 


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Correct answer:


Explanation:

Ionic bonds room bonds in which over there is a finish transfer that electrons between two elements. They room formed between two facets with a big difference in electronegativity, prefer a metal and nonmetal. Molecule with comparable electronegativities share your electrons and kind covalent bonds.

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Because bromine has actually a much greater electronegativity 보다 potassium, that will completely take one electron native potassium to form a complete octet, leaving potassium additionally with a finish octet.

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


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Example question #3 : Compounds, Molecules, and also Bonds


The electronegativities of certain elements are offered below:

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Which that the following compounds is many ionic in character?

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Possible Answers:
Correct answer:

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Explanation:

The degree of ionic character of a compound is figured out by compare the electronegativities of the types involved. The better the distinction in electronegativity, the much more ionic the compound.

Here the biggest arithmetic distinction is discovered in yttrium trichloride.

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Example question #1 : Ionic binding


Which the the complying with is the correct name for the compound 

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 ?


Possible Answers:

Potassium (II) oxide


Potassium (I) oxide


Dipotassium monoxide


Potassium monoxide


Potassium oxide


Correct answer:

Potassium oxide


Explanation:

The compound 

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 contains a metal (potassium) and also a nonmetal (oxygen), so the is an ionic compound, v no change metals. To name an ionic compound, the complying with rules apply:

- the metal component"s name does no change, regardless of quanitiy or charge

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

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

Using this rules, the correct surname is potassium oxide.


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Example concern #5 : Compounds, Molecules, and Bonds


Which the the following most accurately explains an ionic bond?


Possible Answers:

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


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


Positive and negative poles type on a molecule the is made of two nonmetals with different electronegativities.


An attractive force exists in between a cation, which has lost electrons, and an anion, i beg your pardon has got electrons.


Correct answer:

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


Explanation:

An ionic shortcut is an electrostatic force in between a positively fee cation (formed once electrons are lost) and also a negatively fee anion (formed as soon as electrons are gained). While one answer an option mentions positive and also negative, that is actually a description of a polar covalent bond. The easiest method to recognize this is the reality that it specifies a bond between two nonmetals. A metal in generally a component of one ionic compound.


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Example inquiry #6 : Compounds, Molecules, and also Bonds


Which the the statements are true around ionic compounds?


Possible Answers:

They are formed by molecules the equally re-publishing electrons


They space non-polar


Water is an example of one ionic compound


They are 3D arrays of charged molecules


Correct answer:

They room 3D arrays of fee molecules


Explanation:

Ionic compounds space made of atoms that are hosted together by ionic bonds. This bonds enable charged particles that have an extremely different electronegativities to stick together, creating 3D crystals. For example, potassium and also bromine type potassium bromide, one anti-convulsant. The electrons room shared really disproportionately in between the positive and negatively charged particles, through the every the electrons located on the more electronegative atom. Ionic compounds are not non-polar because non-polar is provided to define a molecule conversely, ionic compounds room not molecules. Water is an instance of a polar molecule but is not an ionic compound due to the fact that The hydrogens and oxygen share their electrons.

See more: Why Is Methodical Thinking Important To Engineers, Science Unit 3: Lessons 1 And 2 Flashcards


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


Diffusion have the right to be identified as the net transfer of molecules under a gradient of differing concentrations. This is a passive and also spontaneous procedure and counts on the random movement of molecules and Brownian motion. Diffusion is vital biological process, especially in the respiratory mechanism where oxygen diffuses native 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 be separated from bordering cells by a capillary with red blood cells. The partial pressures of oxygen and carbon dioxide are 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 also area and also thickness refer to the permeable membrane v which the gas passes, in this case, the wall of the avlveoli. P1 and P2 refer to the partial pressure upstream and also downstream, respectively. Further, Dgas­, the diffusion constant of the gas, is identified as: