How many nuetrons are in arsenic?

Answer 1

42 neutrons

Think of it this way:

Arsenic 75. The number of protons and electrons of an element are always the same. Well, we obviously know that there are 33 electrons in arsenic from the Periodic Table, and therefore we have 33 protons. So, to find the number of neutrons is simple. The number of neutrons and protons added together will equal the mass number (75). So it is basic algebra. You want to think logically. Take75 (your mass number) and subtract 33 (the number of protons) and you will get 42.

Hope that helps!

Answer 2

As we should know, atoms are made up of protons, neutrons and electrons. Neutrons and protons are close to 1 amu (Atomic Mass unit)* each. So if arsenic has an atomic number of 33 this means it has 33 protons. Because its mass number is 75, it has 75-33 neutrons=42 *The atomic mass unit is based on carbon-12. Carbon-12 has exactly 12 amu. Scientists then worked out the masses of other particles relative to this. 1 amu is approximately 1.66053886 × 1027 kilograms. That's only 0.000000000000000000000000000166053886 kg.

Answer 3

Arsenic-77 has 33 protons, as do all arsenic atoms. It has 44 neutrons. It is an artificially-produced radioisotope with a half-life of 38.83 hours.

The stable natural isotope of Arsenic is Arsenic-75.

Answer 4

Arsenic is a non metal element. Mass number of it is 75.

Answer 5

In neutral arsenic, there are 77 neutrons. This is found by subtracting the atomic number of arsenic (33) from its atomic mass (which is approximately 75.92).

Answer 6

Arsenic has 42 neutrons.

Answer 7

75

33 As