The number left over in division is called the remainder.
Balancing a chemical equation can often require a whole-number coefficient placed in front of a chemical formula. This upholds the Law of Conservation of Matter, which says that matter cannot be created or destroyed. These coefficients must be in the lowest possible ratio.
Coefficient
The atomic number is expressed as a whole number that represents the number of protons in the nucleus of an atom. It is typically written as a subscript to the left of the element's symbol on the periodic table. For example, hydrogen has an atomic number of 1, meaning it has one proton in its nucleus.
A chemical formula is a combination of element symbols that shows the ratio of elements in a compound. The subscripts in the formula indicate the number of atoms of each element present in the compound.
In chemical symbol, number written on top-left (2H) is is the mass number, and on the bottom left (1H) is atomic number. In chemical symbol the number in the very left of formula is used for balancing chemical equation.
The number left over in division is called the remainder.
This number, which is left after a whole number is divided equally, is usually called the remainder. This number can be written as a whole number (6 R1), as a fraction (1/2 if you were dividing by 2 to begin with), as well as a number of other ways.
In a chemical Equation ,The reactants are on the left side of a chemical equation and the products are on the right side.The number in front of a chemical formula in a chemical equation is called atoms. They should be a balancing number on both the sides.
The reactants are written on the left side of the equation, while the products are written on the right side. The equation is balanced by adjusting the coefficients in front of the chemical formulas so that the number of atoms for each element is the same on both sides.
The number placed to the left of a formula in a chemical equation is the coefficient, which represents the stoichiometry or the ratio of moles of each substance involved in the reaction.
The number you place to the left of a formula in a chemical equation is the coefficient, which represents the amount of that substance taking part in the reaction.
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Your question isn't fully clear, but if you are referring to the process of division of numbers, the "number left over" is called a remainder.
Balancing a chemical equation can often require a whole-number coefficient placed in front of a chemical formula. This upholds the Law of Conservation of Matter, which says that matter cannot be created or destroyed. These coefficients must be in the lowest possible ratio.
The remainder.
I assume you mean the small numbers written under the letters that are the element symbol. The one on the bottom left is the "Atomic Number" and is the number of Protons in the nueclus of the atom, this is what makes an element unique. 1H indicates that Hydrogen has only one proton and is "Atomic Number" one, these numbers are not normally written in unless it's relevent to whatever is being discussed. If the symbol is in a formula for a more complex molecule then there might be a number on the bottom right of a symbol - this is an indication of how many of this atom are in the molecule. so Water is H2O the two indicating there are two hydrogens in the structure. There are also numbers above, on the left the "Atomic Mass" being the total number of Protons and Neutrons in the element. Top right being the "Charge" if any (this would make it an Ion)