It represents the family the element is in.
electrons
valence electrons
The Roman numeral LVIII represent 58
The Roman Numeral system did not have a way to represent zero.
Roman numeral LXXX = 80
electrons
valence electrons
The Roman numeral LVIII represent 58
The Roman numeral C is equivalent to 100
The Roman Numeral system did not have a way to represent zero.
Roman numeral LXXX = 80
The Roman numeral "DC" represent 600.
The Roman numeral 'X' represents 10.
It is the lower case for I = i but they both represent 1 as a Roman numeral
It indicates multiplication by a thousand
They represent the valance electrons in each element. Roman numerals do no represent the valence electrons but it is the group number given by mendeleef.
The roman numeral CCXL represents the number 240.