What is the mass number of an alpha particle? what is the identity of an alpha particle? what kind of charge does an alpha particle have? what is the mass number of the particle emitted from the nucleus during beta minus (β–) decay? what kind of charge does the particle emitted from the nucleus during beta minus (β–) decay have? what is another name for a beta minus (β–) particle? what happes in the necleus of an atom when an alpha particle is emitted? what happens in the nucleus of an atom when a beta particle is emitted? the helium used to fill birthday balloons doesn’t come out of the air, but from out of the ground. some of the gas might escape from the ground into the atmosphere, but the majority of it is trapped in earth’s crust. based on what you have learned in today’s lab, give a reasonable explanation for the presence of helium gas in earth’s crust. why should it take significantly more energy to move a beam of alpha particles than a beam of beta minus (β–) particles? what daughter product is produced when thallium–206, an isotope of thallium, undergoes beta minus (β–) decay? will pick

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

it is the most commonly accepted one