WHAT'S IN THE BOX?

WHAT'S IN THE BOX?

1. ATOMIC NUMBER

   • It represents the number of protons found in the nucleus of one atom of that particular element.
     • each element has its own special number of protons in each atom
     • For example If you add a proton to a carbon atom, you will not have carbon anymore ... it will be nitrogen!
       • The elements change as you move across the table from block to block, left to right, because you are changing the number of protons in each new block.

2. SYMBOL

   • It may be either one capital letter or a combination of one capital and one lowercase letter.
     • The letter(s) usually have something to do with some form of the name of the element.
       • Some are very easy to figure out, like H for hydrogen or O for oxygen.
       • Others refer to older names for the element in different languages like Greek or Latin.

3. RELATIVE MASS

   • the average of all the masses of all the isotopes of that particular atom, calculated according to the actual abundance of the isotope.
   • dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element
     • are calculated from measured values of atomic mass
   • also known as atomic mass