Is this rule apart of the rules for assigning oxidation numbers?

"The oxidation number of an element in its free (uncombined) state is zero (0)."

Which of the following BEST describes oxidation reaction?

When Magnesium atom becomes Mg2+ ion...

Which of the following is TRUE about reduction?

Oxidising agents are those chemicals which cause oxidation to occur.

Following the rules for assigning Oxidation Numbers. What oxidation number will Na have?

What oxidation number will Fe3+ have?

When does the oxidation number become -1 for oxygen?

In the following redox reaction, indicate what is being oxidised.

0         +2-1         +1-1       0

2Na + FeCl2 → 2NaCl + Fe

What does this half reaction tell you? Zn → Zn2+ + 2e-

Order the rules

Unscramble these letters: dtxiionoa