Week 9 CCA Test Review

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Week 9 CCA Test Review
2
Labeling an atom
Electron
Neutron
Proton
Nucleus
Energy Level
3
Fill in the table
Subatomic Particles Charge
Proton
Negative 0 amu
Neutron
Positive
1 amu
Electron
1 amu
No charge
4
What is the atomic mass?
Atomic mass the mass of an atom
Protons Neutrons Atomic Mass
5
What is the atomic number?

• Atomic number Element number used to show where
  on the periodic table the element is found. Also,
  it is the number of protons.

Atomic Number Number of Protons
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What are valence electrons?

• Electrons in the outside energy level, used to
  determine reactivity of an atom

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How can you find the number of neutrons?

• Atomic Mass
• Atomic Number (protons)
• Neutrons

8
How do you know if an atom is neutral?

• Protons (positive charges) Electrons (negative
  charges)
• If it has the same number of positive (protons)
  and negative (electron) charges

3 positive charges
3 negative charges
Remember all elements on the periodic table are
neutral!
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Fill in the missing information
Atomic Mass 9
Atomic Number
Protons 4
Neutrons
Electrons 4
Energy Levels?
Valence Electrons
Is this a stable atom?
Is this a neutral atom?
Element?
Element symbol?
4
2-8-8 Rule Octet Rule
9 - 4 5
2
2
No - Valence level is not full
Yes protons electrons
Beryllium
Be
10
Bohr Model
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Octet (2-8-8) Rule

• First energy level can hold 2 electrons
• Second energy level can hold 8 electrons
• Third energy level can hold 8 electrons

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What do valence electrons determine?

• They determine how reactive an atom is
• 1 and 7 valence electrons most reactive
• 8 valence electrons least reactive
• Determine how am atom will bond
• 1 valence electron give away
• 7 valence electrons - steal

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What is an ionic bond? When does this happen

• Ionic bond when valence electrons are given or
  taken in order for elements to bond
• This happens when an atom needs to give or take
  1, 2, or 3 valence electrons to be stable

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What is an covalent bond? When does this happen?

• Covalent bond when atoms bond by sharing valence
  electrons
• This happens when atoms share and become stable

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How is the Periodic Table arranged?

• By atomic number (number of protons)
• Groups (valence electrons) and Period (energy
  levels)
• Physical and Chemical properties

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Color Metals, Non-Metals, and Metalloids
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Put a circle around the non metals that are gasses
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Label Groups and Periods
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Most reactive groups
Group 1
Group 17
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Least Reactive Group
Noble Gasses Group 18
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What information can be found if you know the
Period of an element?

• Number of energy levels

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What information can be found if you know the
group of an element?

• Number of valence electrons

Remember to cover the one on the two digit
numbers!
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Most reactive groups
Group 1
Why? Group 1 only has one valence electron and
group 17 only has 7. They are both 1 valence
electron away from being stable (happy).
Group 17
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Least Reactive Group
Why? Group 18 has 8 valence electrons which fills
up the valence level, meaning the atom is stable
(happy)
Noble Gasses Group 18
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Why do elements with similar valence level of
electrons have similar chemical properties?

• They will react the same way, because they have
  the same number of valence electrons

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What has similar physical and chemical
characteristics to Nitrogen?

• Any element that is in the same family/group

Nitrogen Family
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Argon - Protons

• Remember Atomic number protons
• Protons 18

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Sodium Atomic Mass

• Atomic Mass 22
• (drop the decimals)

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Carbon - neutrons

• Remember Atomic mass atomic number neutrons
• Neutrons 6

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Neon atomic number

• Atomic Number 10

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Potassium Valence Electrons
1st group 1 valence electron

• Valence electrons - 1

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Boron Valence Electrons
2nd Period 2 energy levels
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Oxygen Bohr Model
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Review from Unit 1

• Physics

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Newtons 3 Laws

1. An object at rest will stay at rest, and an
   object in motion will stay in motion unless acted
   upon by an outside force
2. Fma
3. For every action there is an equal and opposite
   reaction

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Balanced and Unbalanced Forces

• Balanced not moving
• Unbalanced moving (creates a net force)

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Equations

• Speed D/T
• Acceleration change in speed/change in time
• Force ma
• Work Force x distance

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Add

• Differences between speed, velocity, and
  acceleration
• Speed Distance/Time
• Velocity Speed and direction
• Acceleration Speed up, slow down, change
  direction