LESSON - 3rd 6wks

​3rd 6wks Review

• ​Electromagnetic Spectrum

• Periodic Trends

• Atomic Theory

• Classifying Reactions

• ​Balancing Chemical Equations

• ​Molar Mass

• ​Moles

• ​Percent Composition Cm

Multiple Choice

Select the order of waves from long wavelength to short wavelength on the EMS 

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

Multiple Choice

Ionization energy is the...

• energy needed to remove the outermost electron.
• ability of an atom to attract electrons from another atom.

Multiple Choice

Electronegativity is the...

• energy needed to remove the outermost electron.
• ability of an atom to attract electrons from another atom.

Multiple Choice

As you move down a GROUP on the periodic table the atomic radius get bigger. This is because ____________.

• The atoms have more neutrons in the nucleus.

• The atoms have more protons in the nucleus.

• The atoms have more energy levels for the electrons

• The atoms have greater repulsion forces between the protons and electrons

Multiple Choice

As you move across a period on the periodic table the atomic radius tend to get smaller because, ______________.

• the atoms have more mass making them heavier.

• more neutrons, making the nucleus bigger.

• the atoms have more protons, pulling the electrons closer to the nucleus

• the atoms have less energy levels for the electrons to occupy.

Multiple Select

Where is electronegativity and ionization energy the highest on the Periodic Table?

Click all that apply

• up the group

• down the group

• left to right

• right to left

Scientists of the Atomic Theory

​Democritus

• everything in the world is made of tiny particles called atomos,

surrounded by empty space.

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Aristotle

• believed that matter was made of 4 elements, earth, wind, water, and fire.

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Scientists of the Atomic Theory

​J.J. Thomson

• won a Noble Prize for his discovery of electrons

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Ernest Rutherford

• is considered the Father of the Nuclear Age with his Gold Foil

experiment that discovered the nucleus

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​Scientists of the Atomic Theory

​John Dalton's Postulates

1. ALL matter is made of tiny atoms

2. ​Atoms that are the same are identical in every aspect

3. ​Atoms CANNOT be divided, they are indivisible

4. Atoms CANNOT be CREATED or DESTROYED

5. Atoms combine to form compounds

6. ​​​In chemical reactions atoms are combined, separated, and rearranged

7. ​

8. ​

9. ​

​Scientists of the Atomic Theory

​Werner Heisenbery

• ​came up with the Uncertainty Principle that says  it is impossible to determine the exact position and speed of an electron when it is orbiting the nucleus.  

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​Niels Bohr's

• theory was that electrons moved around the nucleus at fixed energies

and distances.

Multiple Select

John Dalton stated:

click ALL that apply

• Atoms are tiny, invisible particles.

• Atoms of one element are all the same.

• Atoms of different elements are different.

• Compounds form by combining atoms.

• Atomos means indivisible

Multiple Choice

He claimed that matter was made of small, hard particles that he called “atomos.”

• Democritis

• Dalton

• Bohr

• Einstein

Multiple Choice

Which Scientist created this model and

proposed the theory that atoms orbit the nucleus in specific orbits.

• Democritus

• Dalton

• Bohr

• Rutherford

Multiple Select

Rutherford is know for ......

• Gold foil experiment

• Noble Prize for finding electrons

• discovering the nucleus

• Father of the Nuclear Age

Multiple Choice

JJ Thomson won the Noble Peace prize for discovering what subatomic particle?

• nucleus

• neutron

• proton

• electron

Multiple Select

Aristotle believed that matter was made of what 4 elements?

​Why are reactions balanced?

Multiple Choice

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter has to be balanced or the chemical equation will blow up

• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Multiple Select

Identify the REACTANTS :

H₂O + CO₂ → HCO + HO

• carbon dioxide

• hydrogen monoxide

• dihydrogen monoxide

• carbonic aicd

Multiple Choice

Which side of a chemical equation is the product side?

• Left (before the yields sign)
• Right (after the yields sign)

Multiple Select

Click all the things you can use to balance a chemical equation

• coefficient

• subscripts

• superscripts

• chemical symbols

Multiple Select

Find the ERROR(s) in the decomposition reaction and replace them with the correct information.

4H₂(g) + 2O₂(g) >> 4H₂O(l)

• it is not balance

• coefficients need to be reduced

• the (g) and (l) are in the wrong place

• decomposition reaction

• combination reaction

Multiple Select

Identify the letter in the parenthesis

4H₂(g) + 2O₂(g) >> 4H₂O(l)

• (g) gas

• (g) gel like

• (l) liquid

• (l) light gas

• (l) Iodine

Mole Concept

• ​Mole concept is used to help chemists count very small particles

• ​​

  Avogadro's Number = 6.02e23

• ​

• ​Molar mass (g/mol) is the mass of one mole of substance

• example - molar mass of water is 18 g/mol

​Conversion Factors

• ​​1 mole particles = 6.02e23 particles

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• 1 mole particles = molar mass (g) from Periodic Table

• ​

• ​1 molar particles = 22.4 liters (volume)

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• 1 molecule = # atoms in that molecule

Steps to follow to solve Mole Problems

1. Identify the GIVEN and what the problem is asking you to convert to

2. Diagonal Rule - SAME UNIT (words ONLY)

3. Find the other half your conversion factor

4. Round the answer using sig figs from the GIVEN

Multiple Choice

Ammonium nitrate, NH4NO3, commonly known as ANFO, is a compound used to make explosive devices. How many grams are in one mole of ammonium nitrate to the nearest thousandths place?

• 31.014 g

• 45.021 g

• 48.045 g

• 80.043 g

Multiple Choice

If one Monster energy drink contains 0.16 g of caffeine, how many moles of caffeine do we consume when we drink 1 can of Monster?

The chemical formula for caffeine is C₈H₁₀N₄O₂ and the molar mass is 194.

• 194.19 moles

• 1.07 moles

• 0.00082 moles

• 1213.69 moles

Multiple Choice

A student needs 65.0 g of copper(II) chloride for an experiment.

How many atoms of copper is this?

• 2.91e23 atoms

• 3.91e25 atoms

• 2.35e23 atoms

• 4.70e23 atoms

​% Composition

Hopefully you watched the lesson and have practiced!