When inspecting containers, what tool is used to determine weld serviceability and the severity of corrosion?

Welder’s hammer

Explanation:

Welders hammer is a type of hammer which has two parts in which one is a flat surface and the other is slightly pointed.

It is used in the removal of different types of splatters which are often associated with welding works.

It is also used as a tool during the inspection containers in order to determine weld serviceability and the severity of corrosion.

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.  

the answer is d.) potassium