Unit 2 test Review

Match

Can you name the scientist and what they did?

• Thomson

• Dalton

• Bohr

• Rutherford

Discovered negative particles in the atom

All matter is made up of atoms

atoms have energy levels with electrons orbit around the nucleus

atom is mostly empty space with a small nucleus

• Discovered negative particles in the atom

• All matter is made up of atoms

• atoms have energy levels with electrons orbit around the nucleus

• atom is mostly empty space with a small nucleus

Multiple Choice

What are the 3 sub-atomic particles called?

• potions, neutrons and electrons
• protons, neurons and electrons
• protons, neutrons and elections
• protons, neutrons and electrons

Multiple Choice

What atom matches this electron configuration?

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc

• Copper

• Nickel

• Germanium

Multiple Choice

By replacing the element symbol, this could be a diagram of which element?

• Li

• Al

• C

• Be

Multiple Choice

What is the Lewis dot structure for a neutral atom of bromine (₃₅Br)?

• The element symbol Br with 7 dots around it.

• The element symbol Br with 8 dots around it.

• The element symbol Br with 5 dots around it.

• The element symbol Br with 35 dots around it.

Explanation Slide...

The Lewis dot structure for a neutral atom of bromine (35Br) should be made up of the element symbol Br with 7 dots around it. These 7 dots represent the 7 valence electrons in a neutral atom of bromine.

Multiple Choice

What is the Lewis dot structure for a neutral atom of carbon (₆C)?

• The element symbol C with 5 dots around it.

• The element symbol C with 4 dots around it.

• The element symbol C with 2 dots around it.

• The element symbol C with 8 dots around it.

Explanation Slide...

The Lewis dot structure for a neutral atom of carbon (6C) should be made up of the element symbol C with 4 dots around it. These 4 dots represent the 4 valence electrons in a neutral atom of carbon.

Multiple Choice

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low

• high, high

• low, high

• low, low

Multiple Choice

If short wavelength has more ENERGY than long wavelength, which color Lightsaber is the most dangerous, or powerful?

• Red

• Orange

• Blue

• Green

Multiple Choice

Which reaction produces harmful radioactive waste?

• Fission

• Photosynthesis

• chain reaction

• Fusion

Multiple Choice

_____is the joining of atomic nuclei

• Fusion

• chain reaction

• Photosynthesis

• Fission

Multiple Choice

_______is the splitting of atomic nuclei

• Fission

• nuclear reaction

• Fusion

• bayler reaction

Multiple Choice

Which process occurs naturally in the centre of stars like the Sun

• Bi-multiple reaction

• Fission

• chemical

• fusion

Multiple Choice

Which process uses uranium rather than fossil fuels to generate the heat

• Muti faceted reaction

• fusion

• chemical

• fission

Multiple Choice

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

• 2

• 4

• 6

• 8

• 10

Multiple Choice

What type of particle has the symbol shown?

• alpha

• beta

• positron

• electron

• gamma

Multiple Choice

What type of decay does this symbol represent?

• beta decay

• alpha decay

• fission

• fusion

Multiple Choice

What is emitted during Alpha Radiation?

• A helium nuclei.
• A helium atom
• Gamma Rays.
• Positrons

Multiple Choice

Negatively charged particles emitted from a nucleus at a high speed are ____.  

• alpha particle
• gamma rays
• beta particles
• X rays

Multiple Choice

The most penetrating type of radiation is the ____.  

• alpha particle
• gamma ray
• beta particle
• uranium

Multiple Choice

List the three types of nuclear radiation in increasing order of penetrating power.  

•   alpha, beta, gamma 
• X ray, beta, gamma
• gamma, beta, alpha

• X ray, gamma, beta 

Multiple Choice

Solve the nuclear decay reaction:

Open Ended

Find the average mass from the isotope below

Isotope % Abundance Mass(u)

Eg - 18 90% 18.765

Eg - 20 3.5% 19.899

Eg - 22 6.5% 22.108

​First multiply each number by it's abundance.

90% = 0.9 * 18.765 = 16.8885

3.5% = .035 * 19.899 = 0.696465

6.5% = .065 * 22.108 = 1.43702

Then add those answers together

​16.8885 + 0.696465 + 1.43702 = 19.021985

​

Our Average Atomic mass for the Eg isotope is 19.022​

​

​% abundance	​Mass (u)
​90%	​18.765
​3.5%	​19.899
​6.5%	​22.108

Multiple Choice

How many protons does this element have?

• 82

• 207

• 207.2

• 125

Multiple Choice

How many neutrons does this element have?

• 82

• 207

• 207.2

• 125

Multiple Choice

How many electrons does this element have?

• 82

• 207

• 207.2

• 125

Multiple Choice

what is the average atomic mass of this element

• 82

• 207

• 207.2

• 125

Multiple Choice

Carbon - 12 has 6 protons and 6 neutrons. Which carbon has 6 protons and 8 neutrons?

• C- 12

• C - 14

• C - 10

• C - 13

Multiple Choice

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

• 1s²2s²2p⁴

• 1s²2s²2p⁶

• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Multiple Choice

Identify the Electron Configuration for Aluminum (Al)

• 1s² 2s² 2p⁶ 3s² 3p¹

• 1s² 2s² 2p⁶ 3s² 3p³

• 1s² 2s² 2p⁶ 3s² 4p¹

​Just believe in yourself. Even if you don't, pretend that you do, and, at some point, you will

​- Venus Williams