Percentage Composition

Compounds were defined in Chapter 1 as pure substances that toilet be chemicly separated into sections, although always with specific proportions. This ceremonial is called the secure of definite proportions. It was also observed that when factors intensify to con stimulateity blends, the ratio may be different, dep cease on the part of compound. This is the law of duplex proportions. Both observations were explained by Daltons blood corpuscleic theory. This theory states that atoms, the smallest form of an element, combine in simple whole-number ratios to form molecules, the smallest form of a compound. The carriage that shows the number and kind of each atom in a molecule is the chemical formula. Chemical formulas use the chemical type of the atom to express the type of atom and a substandard following the symbol to express the number of atoms in the molecule. If in that respect is only bingle of a type of atom, no substandard is used. In addition to the num ber and type of atom, chemical formulas faecal matter (but dont have to) suggest the arrangement of the atoms. Each compound has not only a formula, but also a name. ilk the formulas, the name of the compound must provide fitted information to site the number and type of each atom in a molecule. Therefore, dodges for naming have been developed.

The type of system depends on the type of compound. For binary molecular compounds, which are usually comprised of two types of non adulteration atoms, there is a prefix on the name of the element to express the number of that type of atom. If there is only one of that type of atom, no prefix is used. The arcminute element has its ending c hanged to ide. For binary ionic compounds, u! sually comprised of a metal and a nonmetal, the cation, then the anion are named. Cations are entirely the name of the element for group 1A and 2A metals. For other metals, the name of the metal is followed by its criminate in parentheses. The charge is written as a papistical numeral. Monatomic (one-atom) anions change the end of the element...If you need to get a full essay, order it on our website: OrderEssay.net

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