Changes

: The most [[Stable Isotope|stable isotope]] of [[Arsenic]] has 42 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 75.

: [[Arsenic]] is in [[Period]] 4 of the [[Periodic Table]] because it has 4 [[Electron Orbital|electron shells]].

====Properties====

: [[Arsenic]] is a [[metalloid]] [[element]] so in some conditions it is an [[Electrical Conductor|electrical conductor]].

: [[Arsenic]] is a shiny [[solid]] at [[STP|standard temperature and pressure]] and has a high [[Melting Point|melting point]].