Given the following equations, determine the standard enthalpy of formation (ΔH∘f) for one mole of ICl3(g).I2(g)+3Cl2(g)⟶2ICl3(g)ΔH∘29 8=−214 kJI2(s)⟶I2(g)ΔH∘298=38 kJNote that iodine (I2) is a solid at standard conditions. Your answer should have two significant figures.

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.  

b) nuclear ive learned that in a pedtrodic table

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter