CHEMISTRY COMMUNITY

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The bent molecule contains lone pairs, linear does not.

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The melting point would most likely decrease.

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Typically, yes, because the hydrogen is attracted to atoms N, O, and F, that have stronger partial negative charges.

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It is when an atom uses both its s and p orbitals to bond, in cases where the number of bonds exceeds the number available in the unhybridized state.

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You can just write one X or E- it's like writing X in an equation.

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Since oxygen has greater electronegativity, it will attract the lone electron.

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The phosphorus in the center is less electronegative than oxygen so it wouldn't make sense for it to attract such a large negative charge. Additionally, it is less stable in general for any one element in the structure to have such a large charge.

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They should not always have a formal charge of zero. Instead, the formal charges should equal to the overall charge of what you are drawing.

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Since the central atom is typically the least electronegative, it probably should not have a negative charge. I think that, in general, it is best for the central atom not to have a formal charge.

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Yes, elements with stronger electronegativity are more likely to attract electrons.

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The atom in the center should be the one with the least electronegativity.

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I don't think it is necessarily required, but it does help ensure that you draw the most stable compound.

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Yes, you do.

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You figure out the number of pairs not included in one of the bonds.

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When drawing Lewis structures, I think you should try to draw the one with the lowest formal charge possible.

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When it is positive, that means they lost electrons, so you look at their valence number and subtract the amount of the charge.

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You can look at the group number to figure this out.

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Yes, it is only between nonmetals!

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They can do either!

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Metals tend to form cations, while nonmetals form anions. This is because metals typically lose from their valence shells in order to obtain a full outer shell because it would require more energy to gain them.

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Electron affinity is essentially how attracted an atom is to an electron. It is highest toward the upper right part of the periodic table with the exception of the noble gases because their shells are already filled.

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I think you can only do it when they are in the ground state!

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When frequency decreases, wavelength increases because the two have an inverse relationship.

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Hertz can also be expressed as s^-1, which means one cycle per second

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Wavelength is a measure of distance, so it will typically be in some variation of meters (nanometers, picometers, etc.).

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I think that leaving the answer in grams is okay, but it might depend on the question being asked.

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Molar ratios express the proportion of moles between elements in a reaction. To find the molar ratio, you would balance an equation and then look at the coeffecients.

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Angstroms are used to measure bond length and are expressed as 1*10^-10m

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Accuracy cares about how close a measurement taken is to some accepted, agreed upon value. Precision, however, refers to how reproducible a measurement is (in other words, when measuring something, do you get around the same value each time). Precision does not care about an accepted value for the i...

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These measure different things. A joule measures work, and can have the units of a Newton meter, while a meter just measures length.

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The number of significant figures used depends on the numbers present in the given problem. Sig figs rely on the number given in the problem with the lowest number of significant figures.

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I usually find that starting with the element that occurs the least on both sides works best. For example, if carbon was only in one place on both sides, I would start with that. This helps prevent some of the guessing and checking as you can usually build up to some of the reoccurring elements.

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Percent yield involves both the actual and theoretical yield (the formula is actual/theoretical x100). The theoretical yield assumes that everything in the reaction occurred in perfect conditions, which is not the case in practice. Therefore, the percent yield shows the difference.

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Once you find your limiting reactant, you use the number of moles of that reactant that are present, because the limiting reactant is what dictates the amount ultimately produced through the reaction. This is how you find out what the theoretical yield should be, and you can then compare that to the...

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The limiting reactant is not necessarily always the one with the smallest number of moles. To determine which reactant is limiting, you have to compare the moles of each reactant to the ratios in the balanced chemical equation.

CHEMISTRY COMMUNITY

Search found 35 matches

Re: Bent vs linear

Re: melting point

Re: Hydrogen Bonding

Re: Hybridization

Re: AXE Format

Re: Radicals

Re: Lewis structure

Re: Drawing Lewis Structures

Re: Formal Charges

Re: Electronegative

Re: central atom

Re: formal charge

Re: Lewis Structure

Re: Lone Pairs

Re: Drawing lewis structures

Re: 2.A.17

Re: Valence Electrons

Re: Covalent Bonds

Re: Metalloids

Re: Metals Vs. Nonmetals

Re: Electron affinity

Re: Atomic Radius

Re: homework 1A.3

Re: What are the units of hertz

Re: Unit for Wavelength

Re: Calculate using kg or g?

Re: Molar Ratio

Re: Angstrom

Re: Accuracy vs Precision

Re: Conversion

Re: Number of significant figures

Re: Alternative to Guess and Check?

Re: Percent or theoretical yield

Re: Calculating Theoretical Yield

Re: limiting reactant