Chemistry 4, 5, 6:
Chemists have arranged the chemical elements into a table called the periodic table. This helps us to make sense of the different properties of the elements and their compounds. It also helps us to predict how they will behave in different situations.
In the periodic table, the elements are arranged in order of proton number, also called atomic number. This is the number of positive protons in each atom. It’s written underneath each element. Dmitri Mendeleev put the known elements…
Words 3899 - Pages 16