a subscript
In the formula 2NaOH, the number 2 is called a coefficient. It indicates that there are 2 moles of NaOH present in the compound.
subscript
they are called negative numbers. you show them like this. 3,2,1,0,-1,-2,-3,-4-------------------------------------------------If you are referring to fractions then the top number is called the numerator and the bottom number is called the denominator.---------------------------------------------------A little number like the 2 in the following expression"x2" is called a subscript.
Number of sides - 2
KAl(SO4)2 is the formula unit found in alum. The formula of alum is KAl(SO4)2 .12H2O There are twelve water molecules present per formula unit, it is a sometimes called dodecahydrate.
the formula is (vertices+faces)- 2= edges
2 shots below par is an Eagle.
The sigma sign (Σ, which resembles a sideways M) represents the sum of. Sometimes there are numbers above and below the sigma sign. For example, below the sigma sign can be written x=2, and above the sigma sign can be written 6. This signifies the sum of the numbers between the number below, and the number above. If there is a formula alongside this, it signifies that you should apply the formula to each number, and add the numbers together (hence the Σ, sum of, sign).
The number between two numbers is commonly called the average of those two numbers. The average can be computed with this formula: (a + b) / 2. The average of 0.3 and 0.33 is (0.3 + 0.33) / 2 = 0.63 / 2 = 0.315
number of states X 2
The term for the 4 in the formula 4Ca(NO3)2 is the coefficient. It indicates the number of units of the compound Ca(NO3)2 in the formula.
The formula for water is H2O, the single subscript is the number 2.