Give me 2 examples for both "endothermic change" and "exothermic change".20 pts. "as a donation"

An exothermic reaction releases energy into the environment. Some examples of these are:

The combustion of carbon to form carbon dioxide. Heat is released in the process.

Solidification of a liquid releases heat. This is one of the reasons why water does not get converted to ice spontaneously; the heat that is released has to be eliminated for the reaction to proceed. This is what happens in a refrigerator.

I found these answers. Hope this helps. c;

Exothermic reactions are chemical reactions that release energy. Example: Burning a candle is an example of an exothermic reaction because energy is being released during the reaction in the form of heat. Endothermic reactions are chemical reactions that absorb energy.

An exothermic reaction releases energy into the environment. Some examples of these are:

The combustion of carbon to form carbon dioxide. Heat is released in the process.

Solidification of a liquid releases heat. This is one of the reasons why water does not get converted to ice spontaneously; the heat that is released has to be eliminated for the reaction to proceed. This is what happens in a refrigerator.

explanation:

detials on each model with digrams

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.