Classify these elements by whether they get oxidized or reduced in the reactions shown here: 2ca(s)+o2(g)f2(g)+2li(s)→→2cao(s)2l if(s) drag each item to the appropriate bin.

Elements Calcium (Ca) and Lithium (Li ) are getting oxidized and elements oxygen and fluorine are getting reduced.

Explanation: Oxidized species are the ones which undergo oxidation reaction that means the species which loose their electrons. The oxidation state of these species gets increased. These species tends to form cations (having positive charge).

Reduced species are the ones which undergo reduction reaction that means the species which gain electrons. The oxidation state of these species gets reduced. These species tends to form anions (having negative charge).

In a given chemical reaction:

Reactant side:

Oxidation state of Calcium = 0

Oxidation state of Oxygen = 0

Oxidation state of Fluorine = 0

Oxidation state of Lithium = 0

Product side:

Oxidation state of Calcium = +2

Oxidation state of Oxygen = -2

Oxidation state of Fluorine = -1

Oxidation state of Lithium = +1

From the above information, we can see that oxidation state of calcium and lithium is increasing. Hence, they are getting oxidized.

Similarly, the oxidation state of fluorine and oxygen is decreasing. Hence, they are getting reduced.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

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