Launching Into Chemistry

Question 1

Nucleic Symbol Representation

Answer 1

(Top left: MASS #=> protons + neutrons)
(Top right: ELECTRONS)
ATOM
(Bottom left: PROTONS)

Question 2

Bohr Model

Answer 2

• Nucleus (protons and neutrons) in middle with orbitals of electrons surrounding it.
• As atoms get larger, electrons get farther from nucleus.

Question 3

Quantum Mechanical Model

Answer 3

(2e) S (sphere) (1 orbitals)
(6e) P (dumbbell) (3 orbitals)
(10e) D (-) (5 orbitals)
(14e) F (-) (7 orbitals)

Question 4

Energy a photon carries uses a physical constant relating a single photon’s frequency in Hz to its energy in Joules: PlANCK CONSTANT

Answer 4

• plank constant: h= 6.63 x 10^-34 J*s (amount of energy in a photon per Hz of frequency).
  
  • equation of constant: h= E(energy)/f(frequency) and energy of photon: E=hf
• rearranging: V(velocity)= wavelength * f
  V/wavelength= f
  Speed of light is constant: v= c(speed of light)
  C/wavelength = f

E= hc/ wavelength

Wavelength= hc/E

Question 5

Electrons move “up” and “down?”

Answer 5

• move “up” means excited, more energy, absorb photons.

- move “down” means ground state, less energy, releases photons.

Question 6

Pauli Exclusion Principle

Answer 6

Electrons (arrows) written as “up and down”

Question 7

Aufbau Rule

Answer 7

Write from lowest energy level

Question 8

Hund’s rule

Answer 8

Spread out electrons

Question 9

Electron condensed configuration

Answer 9

Use previous noble gas of element in question

Question 10

Alpha Decay

Answer 10

Alpha particle containing 2 protons + 2 neutrons is emitted.