Lauren, a chemistry student, makes the following claim: My results showed that even more energy was lost during combustion during the food burning compared to burning pentanol. I think this is because the large flames and fast burning caused more energy to be lost to the surroundings. Also, I could see smoke during the combustion, showing that not all the fuel was burned. Does this match your results?

it should be all of them because it asks if you included all of those in your answer

explanation:

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.  

a