Chemical Nomenclature Links

HSU Chemistry Elements Names

HSU Chemistry Table of Ions

HSU Chemistry Table of Common Acids

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Particle

Charge

Relative Mass

Mass

Electron (e-) -1 1/1840 9.11 x 10-28g
Proton (p or H+) +1 ª1 1.67 x 10-24g
Neutron (n) 0  ª1  1.67 x 10-24g

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Atomic number (Z) - the number of protons in the nucleus. This number is characteristic of a given element.

Atomic mass number (A) - the sum of the protons and neutrons in a given atom (p + n).

Atomic mass - the actual mass of an average atom in a sample. The characteristic atomic masses for Earth are shown on periodic tables.

Atomic Mass Unit: the atomic mass unit = amu is a unit of mass for atoms. It is defined as 1/12 the mass of one atom of 12C, where the mass of 12C is defined as 12 exactly.

 

 

 

 

 

 

 

 

 

 

 

 

Try 14

 

 Symbol Z A p n e-
14 6 14 6 8 6

 

 

 

 

 

 

 

 

 

How about 238U6+?

 

 Symbol Z A p n e-
238U6+ 92 238 92 146 86

 

 

 

 

 

 

 

 

 

 

 

 

 

 Symbol Z A p n e-
14 6 14 6 8 6
238U6+ 92 238 92 146 86
35Cl- 17 35 17 18 18
 18O2-  8 18 8  10 10 

 

 

 

 

 

 

 

 

 

 

 

© R A Paselk

Last modified 2 February 2015