number
@ It is the symbol above the number 2 on the QWERTY keyboard.
a figure, symbol, or group of these denoting a number. • a word expressing a number.
it means the kilate number
It means that the number or expression on the left of the symbol is less that the value or expression to the right, or that they are equal.
It means that is is less than or equal to that number.
character
a figure, symbol, or group of these denoting a number.
The symbol for number is #
Synthetic ElementsQuasi-synthetic elements:Technetium, atomic number 43Promethium, atomic number 61Astatine, atomic number 85Francium, atomic number 87Neptunium, atomic number 93Plutonium, atomic number 94Transuranium elementsAmericium symbol Am, atomic number 95Curium symbol Cm, atomic number 96Berkelium symbol Bk, atomic number 97Californium symbol Cf, atomic number 98Einsteinium symbol Es, atomic number 99Fermium symbol Fm, atomic number 100Mendelevium symbol Md, atomic number 101Nobelium symbol No, atomic number 102Lawrencium symbol Lr, atomic number 103Transactinide elements Rutherfordium symbol Rf, atomic number 104Dubnium symbol Db, atomic number 105Seaborgium symbol Sg, atomic number 106Bohrium symbol Bh, atomic number 107Hassium symbol Hs, atomic number 108Meitnerium symbol Mt, atomic number 109Darmstadtium symbol Ds, atomic number 110Roentgenium symbol Rg, atomic number 111Copernicium symbol Cn atomic number 112Provisional names of Recently observed synthetic elements:Ununtrium symbol Uut, atomic number 113Ununquadium symbol Uuq, atomic number 114Ununpentium symbol Uup, atomic number 115Ununhexium symbol Uuh, atomic number 116Ununseptium symbol Uus, atomic number 117.Ununoctium symbol Uuo, atomic number 118
Greater than or equal symbol means the left side number is greater than or equal to right side number. It is mostly used in programming.
CO3 means Lead II If the letters C and O are capital CO if there is no number means carbon oxide