Which element is represented in the Bohr model below

This element is Chlorine.

Explanation:

The amount of protons represent the atomic number of an element. So, 17 protons means the atomic number is 17. This is chlorine because its mass number is 35.5 (roughly) and 17 protons + 18 neutrons gives you this number (shown in the diagram).

Chlorine

Explanation:

In the center of the Bohr model, it tells you that there are 17 protons. The amount of protons is the atomic number. The atomic number 17 is Chlorine.

They also give the amount of neutrons. The protons plus the neutrons gives you the atomic mass.

17 p + 35 n =52 atomic mass

Though the atomic mass of Chlorine is not 52, you have to subtract the amount of electrons. There are 17 electrons presented.

52-17=35

Chlorine's atomic mass is approximately 35.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong