Fill in the blanks to determine the number of protons and electrons in an oxygen ion. (consult the periodic table to determine the number of protons in a neutral oxygen atom.) the o2− ion has protons and electrons. express your answers as integers separated by a comma.

The number of protons and electrons in the given ion are 8, 10 respectively.

Explanation:

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

For the given representation of ion, which is:  

We are given:

Atomic number = Number of protons = 8

Charge on the ion = -2

Number of electrons = Number of protons - charge = 8 - (-2) = 10

Hence, the number of protons and electrons in the given ion are 8, 10 respectively.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

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