The given reaction is second order with respect to A, first order with respect to B and zero order with respect to C.
3 A(g) + 2 B(g) + C(g) → 2 Y(g) + 2(g)
(a) Write the rate law for the reaction and determine the overall order.

(b) Predict by what factor does the rate of reaction change if each of the following changes occurs.
(i) [A] triples
(ii) [B] doubles
(iii) All reactants concentrations are tripled

All reactants concentration are tripled

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.