Search found 30 matches

by Mark 1D
Sat Dec 08, 2018 7:16 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: ions
Replies: 3
Views: 37

Re: ions

Cations lose electrons, giving a positive charge
by Mark 1D
Sat Dec 08, 2018 7:11 pm
Forum: Lewis Acids & Bases
Topic: H-
Replies: 3
Views: 24

Re: H-

Bronsted base because H- is a proton acceptor
by Mark 1D
Sat Dec 08, 2018 7:07 pm
Forum: Lewis Structures
Topic: Lewis Acids & Bases
Replies: 3
Views: 32

Re: Lewis Acids & Bases

Lewis acids are defined as accepting a pair of electrons whilst the Lewis bases are donors of electrons. So it would be based on whether the molecule accepts or gives electron pairs
by Mark 1D
Sat Dec 08, 2018 7:03 pm
Forum: Electronegativity
Topic: Exceptions
Replies: 3
Views: 34

Re: Exceptions

I do not think there are exceptions to the electronegativity trend which goes up and to the right on the periodic table
by Mark 1D
Sat Dec 08, 2018 7:02 pm
Forum: Hybridization
Topic: Expanded Octet Hybridizations
Replies: 2
Views: 26

Re: Expanded Octet Hybridizations

because d orbitals allow those elements to have expanded octets so hybridization can show the d along with the s and p orbitals due to the large amount of valence electrons
by Mark 1D
Fri Dec 07, 2018 8:33 pm
Forum: Lewis Acids & Bases
Topic: Lewis v Bronsted
Replies: 2
Views: 30

Re: Lewis v Bronsted

Lewis describes lewis acid as an acceptor of a lone pair of electrons whilst Bronstead describes an acid as a donor of a proton
by Mark 1D
Fri Dec 07, 2018 8:31 pm
Forum: Lewis Structures
Topic: Elements that break the octet rule
Replies: 6
Views: 58

Re: Elements that break the octet rule

The elements in the d block can violate the octet rule because of the presence of the d orbital into which more electrons can reside
by Mark 1D
Fri Dec 07, 2018 8:30 pm
Forum: Hybridization
Topic: pi vs sigma
Replies: 12
Views: 84

Re: pi vs sigma

Sigma bonds overlap more than pi bonds, allowing for more strength whilst also allowing for rotation
by Mark 1D
Fri Dec 07, 2018 8:27 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power: Size vs. Charge
Replies: 3
Views: 46

Re: Polarizing Power: Size vs. Charge

Smaller atomic radius cations have more polarizing power. A higher charge also gives more polarizing power
by Mark 1D
Fri Dec 07, 2018 8:25 pm
Forum: Octet Exceptions
Topic: Exceptions
Replies: 7
Views: 97

Re: Exceptions

elements in the d block are exceptions as they are able to fill their d orbital with more electrons, allowing for an expanded octet
by Mark 1D
Fri Dec 07, 2018 8:23 pm
Forum: Electronegativity
Topic: Ionic Character
Replies: 5
Views: 47

Re: Ionic Character

I believe oxygen is more electronegative as it is higher than chlorine on the periodic table
by Mark 1D
Fri Dec 07, 2018 8:21 pm
Forum: Sigma & Pi Bonds
Topic: Number of sigma and pi bonds
Replies: 5
Views: 60

Re: Number of sigma and pi bonds

a single bond corresponds to a sigma bond, whilst a double bond is 1 sigma and 1 pi and a triple bond is 1 sigma and 2 pis
by Mark 1D
Fri Dec 07, 2018 8:18 pm
Forum: Properties of Electrons
Topic: Orbitals
Replies: 5
Views: 134

Re: Orbitals

p shell has 3 orbitals I believe
by Mark 1D
Fri Dec 07, 2018 8:15 pm
Forum: Properties of Light
Topic: Speed of light
Replies: 13
Views: 89

Re: Speed of light

3X10^8 should be fine I think
by Mark 1D
Sun Nov 25, 2018 8:13 pm
Forum: Hybridization
Topic: 2F.1 7th Edition
Replies: 1
Views: 14

2F.1 7th Edition

Can someone explain the solution for 2F.1 in the 7th Edition? "State the relative orientation of each of the following hybrid orbitals: (a)sp^3; (b) sp; (c)sp^3d^2; (d) sp^2.
by Mark 1D
Sun Nov 25, 2018 8:06 pm
Forum: Hybridization
Topic: Octet Expansion
Replies: 6
Views: 46

Re: Octet Expansion

electrons fill up the s and p orbital. once those orbitals are filled, d orbital is needed for an atom to have more than 8 valence electrons
by Mark 1D
Sun Nov 25, 2018 8:01 pm
Forum: Bond Lengths & Energies
Topic: Why Are Double Bonds Shorter
Replies: 3
Views: 40

Why Are Double Bonds Shorter

Howdy partners. What is the reasoning for why double bonds are shorter (and therefore stronger) than single bonds? Thanks
by Mark 1D
Sun Nov 25, 2018 7:53 pm
Forum: Octet Exceptions
Topic: Understanding Expanded Octets
Replies: 1
Views: 19

Understanding Expanded Octets

Howdy. Can one of ya'll explain how having a greater number of orbitals, such as a d orbital, allow an element to have an expanded octet? Thanks.
by Mark 1D
Sun Oct 28, 2018 7:15 pm
Forum: Ionic & Covalent Bonds
Topic: 2A.21 7th Edition Question
Replies: 2
Views: 22

2A.21 7th Edition Question

Howdy ya'll. Can someone explain why the ground state electron configuration for Ag^+ is [Kr]4d^10 in question 2A.21? Thanks
by Mark 1D
Sun Oct 28, 2018 7:06 pm
Forum: Ionic & Covalent Bonds
Topic: 2A.6 7th Edition
Replies: 1
Views: 16

2A.6 7th Edition

Howdy! 2A.6 asks for the ground-state electron configuration of the ion P^3-. Can someone explain how I would go about solving this?
by Mark 1D
Sun Oct 28, 2018 7:00 pm
Forum: Ionic & Covalent Bonds
Topic: Question regarding ionic bonds
Replies: 9
Views: 61

Question regarding ionic bonds

Howdy partners. Are ionic bonds always between non-metals and metals?
by Mark 1D
Sun Oct 21, 2018 7:02 pm
Forum: Properties of Electrons
Topic: Concept Behind Orbitals
Replies: 6
Views: 54

Concept Behind Orbitals

Howdy there. I was wondering about the conceptual explanation behind why higher orbitals have more energy. Is it because of distance from the positively charged nucleus?
by Mark 1D
Sun Oct 21, 2018 7:00 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: HW Question Regarding 1B.27
Replies: 6
Views: 90

HW Question Regarding 1B.27

Howdy! 1B.27 says "A bowling ball of masss 8.00 kg is rolled down a bowling alley lane at 5.00 +/ 5.0 m/s. What is the minimum uncertainty in its position?" Can one of ya'll explain to me how I use the uncertainty equation to obtain the minimum uncertainty?
by Mark 1D
Sun Oct 21, 2018 6:55 pm
Forum: DeBroglie Equation
Topic: 1B. 25 7th Edition
Replies: 2
Views: 34

1B. 25 7th Edition

Howdy ya'll. 1B.25 states "What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350 pm? Can somebody explain how to obtain the solution please. Thanks
by Mark 1D
Sun Oct 14, 2018 7:25 pm
Forum: Properties of Light
Topic: Photons
Replies: 4
Views: 79

Re: Photons

A single photon requires the sufficient energy needed to remove a single electron. :)
by Mark 1D
Sun Oct 14, 2018 7:23 pm
Forum: Properties of Light
Topic: Measurable Wavelengths
Replies: 3
Views: 25

Measurable Wavelengths

Does anybody know how long a wavelength must be to be "measurable"?
by Mark 1D
Sun Oct 14, 2018 7:19 pm
Forum: Properties of Light
Topic: 1A.3 7th Edition Question
Replies: 4
Views: 57

1A.3 7th Edition Question

1A.3 Which of the following happens when the frequency of electromagnetic radiation decreases? Explain your reasoning. (c) The extent of the change in the electrical field at a given point decreases. Can someone explain what happens to the "extent of the change in the electrical field at a give...
by Mark 1D
Sun Oct 07, 2018 5:09 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E15 7th Edition
Replies: 1
Views: 51

E15 7th Edition

The molar mass of the metal hydroxide M(OH)2 is 74.10 gmol. What is the molar mass of the sulfide of this metal? I understand how to obtain molar mass but how do I identify the sulfide of M(OH)2? Thanks
by Mark 1D
Sun Oct 07, 2018 5:06 pm
Forum: SI Units, Unit Conversions
Topic: Question regarding showing units within work
Replies: 2
Views: 43

Question regarding showing units within work

When working on the answer to a question, does anybody know if we have to show units in our work? I understand our final answer must have units.
by Mark 1D
Sun Oct 07, 2018 5:03 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Atomic Weight vs Molecular Weight
Replies: 2
Views: 26

Re: Atomic Weight vs Molecular Weight

I believe atomic weight is the measured weight of the atom whilst the molecular weight is the measured weight of the molecule (so add weights of the atoms within the molecule). ;)

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