The atomic number of arsenic (As) is 33.
See the Web Links and the Related Questions to the left of this answer for a periodic table and more information about this element.
There are 33 electrons in an Arsenic atom.
A neutral atom has equal numbers of positively charged protons and negatively charged electrons. The atomic number of an element is its number of protons. Arsenic's atomic number is 33, so atoms of arsenic have 33 protons. A neutral atom of arsenic would then also have 33 electrons.
Arsenic is a non metallic element. Mass number of it is 75.
The number 76 represents the total number of protons and neutrons in the nucleus of an atom of arsenic-76, which is an isotope of the element arsenic. It helps to identify the specific isotope of arsenic based on its mass number.
Arsenic atoms typically consist of 33 protons, 33 electrons, and varying numbers of neutrons depending on the isotope. Each subatomic particle has its own specific role in determining the properties and behavior of the arsenic atom.
The Atomic Number and thus the number of protons
As all atoms do, arsenic has one nucleus. That nucleus consists of 33 protons and 42 neutrons.
The oxidation number of arsenic (As) in the AsO4^-3 ion is +5. This is because oxygen typically has an oxidation number of -2, and there are four oxygen atoms bonded to the arsenic atom, totaling -8. The overall charge of the ion is -3, so the arsenic must have an oxidation number of +5 to balance the charges.
Arsenic in AsO2 has one lone pair of electrons. This is because the arsenic atom has a steric number of 4, including 3 bonded atoms (two oxygen atoms and one other atom in the molecule) and 1 lone pair, following the octet rule.
The chemical formula of arsenic pentabromide is AsBr5. It consists of one arsenic atom bonded to five bromine atoms.
The atomic number of arsenic is 33.
In AsH3, arsenic (As) has an oxidation number of -3 since hydrogen (H) is always assigned an oxidation number of +1 in compounds.