Search found 24 matches

by Isabella Barkett 1G
Sun May 27, 2018 5:47 pm
Forum: Air Pollution & Acid Rain
Topic: Acid deposition
Replies: 2
Views: 296

Acid deposition

How is acid deposition formed?
by Isabella Barkett 1G
Sun May 27, 2018 5:46 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Ionisation [ENDORSED]
Replies: 2
Views: 250

Ionisation [ENDORSED]

How do strong and weak acids differ in the extent of ionisation?
by Isabella Barkett 1G
Sun May 27, 2018 5:38 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Conjugate acid-base pair
Replies: 1
Views: 182

Conjugate acid-base pair

How do you find whether a pair of species are an acid-base pair?
by Isabella Barkett 1G
Fri May 18, 2018 1:15 am
Forum: Ionic & Covalent Bonds
Topic: Allotropes
Replies: 1
Views: 69

Allotropes

Do we need to know the giant structure examples of covalent and ionic bonding (ie. graphite and diamond)?
by Isabella Barkett 1G
Fri May 18, 2018 1:14 am
Forum: Ionic & Covalent Bonds
Topic: Melting and Boiling Points
Replies: 3
Views: 103

Melting and Boiling Points

What are the differences in the melting and boiling points of ionic and covalent bonds?
by Isabella Barkett 1G
Fri May 18, 2018 1:13 am
Forum: Ionic & Covalent Bonds
Topic: Solubility
Replies: 3
Views: 87

Solubility

Are covalent bonds usually soluble or insoluble in water?
by Isabella Barkett 1G
Sat May 12, 2018 12:38 pm
Forum: Octet Exceptions
Topic: Octet fule in forming compounds
Replies: 2
Views: 120

Octet fule in forming compounds

How does calcium obey the octet rule when reacting to form compounds?
by Isabella Barkett 1G
Sat May 12, 2018 12:34 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal charge of ClO2- [ENDORSED]
Replies: 4
Views: 278

Formal charge of ClO2- [ENDORSED]

Is the compound drawn as Cl-O-O or O-Cl-O?
by Isabella Barkett 1G
Sat May 12, 2018 12:31 pm
Forum: Resonance Structures
Topic: Resonance structure of benzene
Replies: 4
Views: 164

Resonance structure of benzene

What is the resonance structure of benzene (the aromatic ring compound)?
by Isabella Barkett 1G
Sun May 06, 2018 3:47 pm
Forum: Properties of Light
Topic: The visible spectrum
Replies: 4
Views: 207

The visible spectrum

What is the difference between the continuous spectrum and the line spectrum?
by Isabella Barkett 1G
Sun May 06, 2018 3:42 pm
Forum: Trends in The Periodic Table
Topic: Ionisation energy
Replies: 1
Views: 65

Ionisation energy

How does ionisation energy change down and across the periodic table?
by Isabella Barkett 1G
Sun May 06, 2018 3:36 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shapes of orbitals
Replies: 6
Views: 249

Shapes of orbitals

Will we need to know the shapes of the different orbitals? ie how p is a dumbbell shape or s is spherically shaped?
by Isabella Barkett 1G
Tue Apr 24, 2018 10:01 pm
Forum: Properties of Light
Topic: test 2
Replies: 18
Views: 543

Re: test 2

I think the questions will be similar to those we did in class discussions.
by Isabella Barkett 1G
Tue Apr 24, 2018 9:54 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Order of Orbitals
Replies: 10
Views: 472

Re: Order of Orbitals

The orbitals are differentiated in terms of their relative energy, s having the lowest and f having the highest (s<p<d<f).
by Isabella Barkett 1G
Tue Apr 24, 2018 9:52 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Special Orbitals
Replies: 2
Views: 105

Re: Special Orbitals

I think there are two anomalous configurations when an element fills the orbital 'abnormal': chromium and copper which do not seem to fit the pattern. Chromium is energetically more stable to have 3d5 then pair up the 4s orbital ((Ar)4s1 3d5). Copper has extra stability due to a full set of 3d orbit...
by Isabella Barkett 1G
Wed Apr 18, 2018 1:11 pm
Forum: Properties of Electrons
Topic: electron mass
Replies: 15
Views: 516

Re: electron mass

Electrons have a mass but in comparison to protons and neutrons in an atom, they will not affect the total mass I think.
by Isabella Barkett 1G
Wed Apr 18, 2018 1:01 pm
Forum: Properties of Light
Topic: Rydberg equation
Replies: 2
Views: 97

Re: Rydberg equation

The Rydberg Equation is used to find the wavelengths of all the spectral lines in the emission spectrum of hydrogen, for example the wavelength of light which moves between n=2 and n=4.
by Isabella Barkett 1G
Wed Apr 18, 2018 12:58 pm
Forum: Properties of Light
Topic: Series Question
Replies: 3
Views: 99

Re: Series Question

We looked at the Hydrogen spectral series which accounts for the transition of electrons between different energy levels in an atom. The hydrogen spectrum consists of a series of lines of different colours (violet, blue, green and red) in the visible region of the spectrum. The Lyman series correspo...
by Isabella Barkett 1G
Thu Apr 12, 2018 10:57 pm
Forum: SI Units, Unit Conversions
Topic: Temperature
Replies: 5
Views: 248

Re: Temperature

The most common form of measurement is Celsius, Kelvin is almost used in relation with celsius as it is an absolute scale meaning that it indicates the temperature at which molecules stop moving (0K = absolute zero).
by Isabella Barkett 1G
Thu Apr 12, 2018 10:53 pm
Forum: SI Units, Unit Conversions
Topic: writing out conversions in one long line vs. steps
Replies: 16
Views: 561

Re: writing out conversions in one long line vs. steps

I find it easier to break the problem in multiple steps as it reduces any room for error and makes it easier to understand the question.
by Isabella Barkett 1G
Thu Apr 12, 2018 10:51 pm
Forum: SI Units, Unit Conversions
Topic: Volume V Density [ENDORSED]
Replies: 5
Views: 251

Re: Volume V Density [ENDORSED]

Volume is the amount of space a substance takes up. On the other hand, the density is the mass of an object divided by the object's volume.
by Isabella Barkett 1G
Sun Apr 08, 2018 10:34 am
Forum: SI Units, Unit Conversions
Topic: Units + their meanings
Replies: 3
Views: 139

Re: Units + their meanings

Also if it helps, g/mol = mass (in grams) / number of moles (mol) - lending itself to the correct units of the molar mass
by Isabella Barkett 1G
Sun Apr 08, 2018 10:31 am
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 66323

Re: Rusty on High School Chem [ENDORSED]

Usually with chem practicing a variety of questions on the topic is very useful - so I would recommend doing extra questions in the text book.
by Isabella Barkett 1G
Sun Apr 08, 2018 10:30 am
Forum: Balancing Chemical Reactions
Topic: Balancing equations with fractions [ENDORSED]
Replies: 13
Views: 462

Re: Balancing equations with fractions [ENDORSED]

Also it is easier to use whole numbers as it would be simpler to decipher the mole ratio between reactants and products.

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