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Chemistry Exam 2

Last updated over 1 year ago

8 questions

1

6

15

4

4

5

5

10

Question 1

1.

Question 2

2.

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Question 3

3.

Question 4

4.

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Question 5

5.

Question 6

6.

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Question 7

7.

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Question 8

8.

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

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

An Anion with a charge of -3

An Anion with a charge of -2

An Anion with a charge of -1

A Cation with a charge of +1

A Cation with a charge of +2

A Cation with a charge of +3

Match the following elements with their description

O

Electron configuration of 1s22s22p63s23p5

Cl

Electron configuration of 1s22s22p1

K

forms anion with charge of -3

N

forms anion with charge of -2

Mg

forms cation with charge of +1

B

Electron configuration of 1s22s22p63s2

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

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

After the reaction, Cl forms

isotopes

Li-6 and L-7 are two different

cations

This reaction happens because of a transfer of

anions

After the reaction, Li forms 

electrons

Reorder from Least Dense to Most Dense

Magnesium

Lead

Hydrogen

Oxygen

Use the periodic table to match the following

Atomic Mass of Phosphorus-32

16

Number of Protons in Sulfur

10

Number of Neutrons in Ca-40

12

Atomic Number of Magnesium

32

Number of Neutrons in F-19

20

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

has wavelength of 8.39 x 10-4 m

Microwave with frequency of 2.8 x 1011 Hz

has wavelength of 1.8m

Radio wave with frequency of 3.06x 107 Hz

has wavelength of 1.3 x 10-2m

Microwave with frequency of 1.66x 108 Hz

has energy of 4.65 x 10 -23 J

Microwave with frequency of 2.31 x 1010

has wavelength of 9.8 m

Microwave with frequency of 3.58 x 1011