CHEMISTRY COMMUNITY

905096106

HSO4^1- and HPO4^2- are examples of amphoteric compounds

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Lone pairs on lewis structures determine whether or not a molecule can donate an electron pair/is a lewis acid.

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Conjugate acids and bases solely differ by one proton.

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No. Although both shapes have the same shape (bent) their bond angles are different because they have different electron geometry. AX2E has trigonal planar electron geometry while AX2E2 has tetrahedral electron geometry. Because of this AX2E has a bond angle of <120 while AX2E2 has a bond angle of <...

905096106

It is not trigonal planar because of the additional two lone pairs. These distort the shape and make the bond angles smaller so the 120 degree angle found on trigonal planar shapes is not obtained.

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I would suggest first looking at the lewis structure and determining if it is symmetrical, this can be figured out by whether or not all the atoms surrounding the central atom are the same i.e. CCl4

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Lone pairs disrupt the shape by making the angles between molecules smaller

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Drawing out the shape or simply determining the shape through visualization is the best way to determine the shape.

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Understanding the sigma/pi bond composition of a bond helps you to understand the internal structure of the bond and what it looks like.

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The way this is solved is by counting the total number of electrons in all the orbitals with a certain n. For n=3 there could 3s 3p and 3d so thats 2+6+10 so 18 possible

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The +1/2 electrons are the first half of electrons in an orbital. For example each orbital is filled by a +1/2 first and then a -1/2 electron

905096106

Polar versus nonpolar is very difficult to determine but it is based off of the difference in electronegativity between the atoms in a molecule. usually if the molecule is very symmetrical with its lewis dot structure then it will be nonpolar.

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Increasing intensity only increases the amount of photons not the energy of each individual photon. Light is acting as a particle in this case however in general light can act as a particle or a wave.

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The de broglie equation is used when taking mass into account. I.E. calculating the wave length of an electron or an atom instead of a photon of light.

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I reccommend watching khan academy or reading through the textbook. Rewriting the notes was particularly helpful to me

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You calculate the individual electronegativities of the p-cl bond and then add them together.

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I believe a metallic bond is a bond between two metals.

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smaller anions have more polarizability. As atoms get bigger in size, they have more polarizing power.

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Actual, numeric values for electronegativity are the only way to determine the electronegativity of elements aside from using the periodic trend

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You can distinguish if an atom has a full octet by their number of valence electrons and core electrons. With these numbers you can determine how shells would fill up. Essentially a full octet means that an atom would have 8 valence electrons (a noble gas). In their efforts to bond, atoms look to fo...

905096106

Ionization Energy and Electronegativity are also related because if an electron has high electronegativity then it will be more difficult to remove electrons and therefore the ionization energy will be higher.

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I believe it is because if you count the first given wavelength would be n = 3, then n=4 and so on... does that help?

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Formula Units are the same thing as molecules except for compounds with ionic bonds.

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Valence electrons are simply bound electrons in the outermost electron levels surrounding the nucleus.

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Lavelle did not go over the equation for energy level changes during lecture but explained how to implement the constant without having to memorize the formula.

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I would round on your last step because the more you round the more your answer becomes inaccurate.

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I would say moles is a more correct way to say it because the coefficients used in chemical equations represent the ratio in moles within the chemical reaction.

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I would say moles is a more correct way to say it because the coefficients used in chemical equations represent the ratio in moles within the chemical reaction.

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The best tactic that worked for me would be taking small groups of ions and writing each one four or five times in a unique color. I did this my sophomore year of high school and it has helped me remember the ions even today.

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I definitely understand your struggles. I am a freshman and I haven't taken chemistry since my senior year of high school. I agree with the others above that your best bet would be to read the textbook and review the modules posted on the website.

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Amphoteric compounds besides water

Re: lewis acids & bases

Re: Clarification of Conjugate Acids and Bases

Re: Bond angle

Re: T shaped

Re: polarity vs. nonpolarity

Re: lone pair influence on shape

Re: Bond Angles

Re: Sigma/Pi bonds

Re: Number of Electrons based on principle quantum number

Re: Quantum number Ms

Re: Polar vs Non polar

Re: Photoelectric Effect - waves vs. photons

Re: calculating wavelength

Re: Quantum Test

Re: Determining ionic character vs covalent

Re: Metallic Bond

Re: Polarizability

Re: Electroegativity

Re: octets

Re: Ionization Energy vs. Electronegativity

Re: Confused on Problem 1.57 (regarding the Balmer Series)

Re: formula units [ENDORSED]

Re: Free vs. Bound Electrons

Re: Rydberg constant

Re: Sig Figs

Re: Moles vs Number of Molecules

Re: Moles vs Number of Molecules

Re: Common ions

Re: Rusty on High School Chem [ENDORSED]