CHEM1110 TERM TEST 1 - SECTION 1 CLARIFICATION

Question 1

Isotopes

Answer 1

Atoms with the same number of protons but different numbers of neutrons (a p Z)
a: atomic pass
p: proton
z: atomic number

Question 2

Conversion from m to nm

Answer 2

m x (10^-9nm/1m)

Question 3

ER spectrum order

Answer 3

Big wavelength (low energy)–> small wavelengths (high energy)
Radio, microwave, infrared, visible light, UV, Xray, gamma ray

Question 4

Visible light spectrum

Answer 4

Big wavelength (low energy) –> small wavelength (high energy)
Red, orange, yellow, green, blue, violet

Question 5

Equation for speed of light, frequency, wavelength λ (3)

Answer 5

c = λv
λ = c/v
v = c/λ

Question 6

Energy of photon equation (2)

Answer 6

E = hc/λ
E = hv
V = E/h

Question 7

Conversion from nm to m

Answer 7

nm x 1m/10^9nm

Question 8

Absorption

Answer 8

Gaining more energy to go higher orbit

Question 9

Emission

Answer 9

Releasing energy to go to lower orbit

Question 10

Energy of electron in orbit equation

Answer 10

-2.179 x 10^-18 J (z^2/n^2f - z^2/n^2i)

Question 11

De Broglie relation equation

Answer 11

λ = h/mass(e-) v

Question 12

Uncertainty principle fixed equation

Answer 12

h/(pi)(mass)(v)

Question 13

Nodes

Answer 13

• Location of no electrons (n-1)
• Radial & spherical nodes

Question 14

Principle quantum number (n)

Answer 14

• Indicates orbital size and energy
• Non zero integer
• As n increases, so does distance from nucleus
• Bigger n = larger orbital

Question 15

Angular momentum quantum number (l)

Answer 15

• Indicates the shape of the orbital
• Integer
• Every number from from 0 to n-1

Question 16

Magnetic quantum number (ml)

Answer 16

• Indicates the orientation of the orbital
• Integer from -l to 0 to +1
• Number of ml = number of orbitals

Question 17

Size of orbital

Answer 17

l = 0 (s)
l = 1 (p)
l = 2 (d)
I = 3 (f)

Question 18

Kinetic energy equation

Answer 18

KE = hv - binding energy

Question 19

Ground state configuration

Answer 19

Just write configuration normally

Question 20

Excited state configuration

Answer 20

In transition metals and we take out the s electron and put it in the d orbital

Question 21

SI Units

Answer 21

• Mega 10^6
• Kilo 10^3
• Deci 10^-1
• Centi 10^-2
• Milli 10^ -3
• Micro 10^-6
• Nano 10^-9
• Pico 10^-12

Question 22

Draw the orbitals