No you cannot. 63 is the maximum number of columns for a table created in Word. If you require more than that, use Excel instead.
45 columns is the maximum allowed, but that is far more than you need or is practical to use.
When you are defining the amounts of rows and columns for a table, Word allows to have one row and one column, in other words a single cell. So that is the absolute minimum. You may not regard that as being a table, so you can have two rows and one column or one row and two columns. You can have anything above that. Word usually suggests five columns and two rows as a default, but that can be changed.
what equals 63
An example is: 9*7 = 63
63.
63 elements were in Dmitri Mendeleev's First periodic table 63 elements were in Dmitri Mendeleev's First periodic table
The group number tells you the number of valence electrons in the outer shell. This is important because it is the valence electrons that participate in bonding, and thus in determining the properties of the element.
Europium, number 63
7x + 3y=63
7 or 9 (assuming Times Table is from 2 to 12 x 12)
63
EU = Europium (atomic number 63)