Silicon with an atomic mass of 28.085, next highest is Potassium
with an atomic mass of 39.098. Below Silicon is Aluminum with
atomic mass of 26.982, and Magnesium with 24.3305, and Sodium with
The elements are classified as metalloids. The elements that
border it are:
B= Boron Atomic # 5 Atomic Mass 11
Si= Silicon Atomic # 14 Atomic Mass 28
As= Arsenic Atomic # 33 Atomic Mass 75
Te= Tellurium Atomic # 52 Atomic Mass 128
At= Astatine Atomic # 85 Atomic Mass 210
No. Atomic numbers are characteristic of elements. Each element
has its own unique atomic number.
Only the 24 known isotopes of silicon will have the same atomic
number because, only the atomic mass varies. Th element is still
the same, i.e., silicon.
Silicon atoms, atomic number 14, have 14 protons in the nucleus.
The neutral atom then has 14 electrons. Silicon 28 the most common
isotope of silicon has 14 neutrons in the nucleus giving a mass
number of 28. The atomic mass of silicon 28 relative to
carbon12=12. is 27.9769265325(19)