oxidation numbers 2022

What is an ion?

• A Charged Atom
• A Large Atom
• A Small Atom
• A Cute Atom

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Why are ions formed?

• To make our lives difficult
• Because atoms want 8 valence electrons
• Because atoms have the same number of protons and electrons
• Because atoms gained neutrons

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An atom becomes _________ when it gains electrons.

• Positive
• Negative
• Neutral
• Invinsible

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What is the charge of a sodium ion?

• +2

• +1

• -1

• -2

What charge will an Oxygen ion have? 

• +1
• -1
• +2
• -2

If an element has 3 valence electrons, what charge will likely form on its ion ?

• +3
• +5
• -3
• -5

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Elements on the LEFT side of the periodic table will most likely form:

• Positive ions
• Negative ions
• Neutral Ions
• None of these

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NGSS.HS-PS1-1

Why is the oxidation number of N in NO₂^1-  _{a +3}?

• It gained 5 electrons to become full

• It lost 3 electrons to have a 1/2 full sublevel

• It gained 3 electrons to have a full sublevel

• It lost 3 electrons to have a full sublevel

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Why is the oxidation number of C a +4 in CO₂?

• lost electrons to gain a 1/2 full sublevel

• It lost electrons to gain a full sublevel

• It gained electrons to become perfect

• It lost electrons to become perfect

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NGSS.HS-PS1-1

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Why is the oxidation number of S a +6 in SO₄ ^2-  ?

• 1/2 full subevel

• full sublevel

• full level

• it is sharing electrons

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