The Roman numeral IV indicates 4 (-1+5 = 4)
The systematic name for aurous sulfide is gold(I) sulfide. In this compound, gold has a +1 oxidation state, which is indicated by the Roman numeral I in its name. The sulfide part refers to the sulfide ion, which has a -2 charge. Therefore, the formula for gold(I) sulfide is Au2S.
The Roman numeral for 77 is LXXVII.
The formula of lead (II) sulphide is PbS whilst the formula of lead (IV) sulphide is PbS2. The formula is: PbS and the number of Solubility product constants is 3x10^-25 if you're interested;)
The Roman numeral at the top of a column on the periodic table indicates the number of valence electrons an element in that column has. Valence electrons are the electrons in the outermost shell of an atom and are involved in chemical bonding. Group IA elements have 1 valence electron, Group IIA elements have 2 valence electrons, and so on.
The compound written as CuCl₂ is named copper(II) chloride. The "Cu" represents copper, and the "Cl₂" indicates there are two chloride ions. The Roman numeral II indicates that copper has a +2 oxidation state in this compound.
MnO2 is called manganese IV oxide because manganese has a +4 oxidation state in this compound. The Roman numeral IV indicates that manganese is in the +4 oxidation state, where it has lost four electrons.
It indicates multiplication by a thousand
M = 1000 none of the other letters are Roman numerals
The formula for Manganese(III) iodide is MnI3. This compound is an ionic compound made of one manganese atom with a +3 charge and three iodine atoms each with a -1 charge. It is important to note that the Roman numeral III in the name indicates the oxidation state of manganese in this compound.
The roman numeral of a cation indicates he charge of the cation.
It indicates the oxidation state.
It indicates multiplication by a thousand
The chemical formula for gold(I) sulfide is Au2S. In this compound, gold has a +1 oxidation state, denoted by the Roman numeral I, and sulfur has a -2 oxidation state. The formula indicates that two gold atoms combine with one sulfur atom to form the compound. The correct name for this compound is gold(I) sulfide.
In todays modern usage of Roman numerals it indicates multiplication by a thousand.
A bar or a line over a particular Roman numeral indicates that it is to be multiplied by a thousand.
The bar in Roman Numerals is named vinculum. This bar is placed above a Roman Numeral and indicates a multiple of 1000. The Romans did not use this name for the bar, it was introduced in the Middle Ages.
The Roman numeral "ii" represents the number 2. In the Roman numeral system, the letters "i" represents 1, and when it is repeated, it indicates addition. So, "ii" is the equivalent of adding two "i"s together to represent the number 2.