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Chemistry Exam 2

Last updated 12 months ago
8 questions
1

If Aluminum gives away three electrons in a slow oxidation by Oxygen, it becomes

6

Match the following elements with their description

Draggable itemCorresponding Item
Cl
Electron configuration of 1s22s22p63s23p5
N
Electron configuration of 1s22s22p1
O
forms anion with charge of -3
Mg
forms anion with charge of -2
B
forms cation with charge of +1
K
Electron configuration of 1s22s22p63s2
15

State which statements are true

  • B has electron configuration of 1s22s2
  • Oxygen has electron configuration of 1s22s22p5
  • All Noble gases have three full p orbitals except for Helium
  • All alkali metals have 3 electrons in their outer s subshell
  • Alkali earth metals have much lower 2nd ionization energy than 3rd ionization energy
  • There are 8 f orbitals in each of the 4th and 5th f subshells
  • There are 5 d orbitals in each of the the 3rd, 4th, 5th and 6th f subshells
  • Aluminum has a 1s22s22p63s3 electron configuration
  • the 1st ionization energy is the energy required to remove the outermost electron from an atom
  • p orbitals are shaped like spheres
  • The Photoelectric effect explains why photons of energy can collide with electrons and push them from their ground state orbitals to higher orbitals, or away from the atom
  • When electricity passes through a neon gas in a tube, electrons in the neon atoms gain energy and jump to a higher energy level (excited state).
    As these excited electrons fall back to their original lower energy level, they release the absorbed energy as a photon of light, which is visible as the neon glow.
  • Red light has a higher frequency than blue light
  • Ultraviolet light has a shorter wavelength than Infrared light
  • alpha rays, beta rays, and gamma rays are photons with different frequencies
  • True
  • False
4

A mixture of Li-6 and Li-7 reacts with Chlorine gas to form LiCl.

Draggable itemCorresponding Item
After the reaction, Li forms
isotopes
After the reaction, Cl forms
cations
Li-6 and L-7 are two different
anions
This reaction happens because of a transfer of
electrons
4

Reorder from Least Dense to Most Dense

  1. Oxygen
  2. Magnesium
  3. Hydrogen
  4. Lead
5

Use the periodic table to match the following

Draggable itemCorresponding Item
Number of Neutrons in Ca-40
16
Atomic Mass of Phosphorus-32
10
Atomic Number of Magnesium
12
Number of Neutrons in F-19
32
Number of Protons in Sulfur
20
5

Match the following (c = λν = 3 x 108 m/s, E = hv, h = 6.636 x 10-34 Js)

Draggable itemCorresponding Item
has wavelength of 9.8 m
Microwave with frequency of 2.8 x 1011 Hz
has wavelength of 8.39 x 10-4 m
Radio wave with frequency of 3.06x 107 Hz
has wavelength of 1.8m
Microwave with frequency of 1.66x 108 Hz
has wavelength of 1.3 x 10-2m
Microwave with frequency of 2.31 x 1010
has energy of 4.65 x 10 -23 J
Microwave with frequency of 3.58 x 1011
10

Write a 7 sentence paragraph describe differences between chemical and physical properties of Alkali metals, Alkali Earth metals, Transition metals, Halogens, and Noble gases