(i) The names should be short and obviously related to the atomic numbers of the elements. (ii) The names should end in ‘ium’ whether the element was expected to be a metal or otherwise. (iii) The symbols for the systematically named elements should consist of three letters.
How do you write the chemical name of an element?
Write the first element in a symbolic way For example, if you are writing the name of Lithium nitride (Li3N), the first element is Lithium. The chemical symbol of this element is Li. Now to show the number of atoms in the equation of Lithium nitride, you have to use a number in subscript, i.e. Li3.
How do you chemically name?
How do you decide which element to name first?
The element with the lower group number is written first in the name; the element with the higher group number is written second in the name. Exception: when the compound contains oxygen and a halogen, the name of the halogen is the first word in the name.
What are modern rules for naming elements?
According to the IUPAC, “elements can be named after a mythological concept, a mineral, a place or country, a property, or a scientist”.
How are metals named?
The metal is named first. Its name is unchanged. The anion is named last. If it is from an element, such as chlorine, its name is changed so that one or more syllables are dropped and the ending -ide is added, such as chloride.
What are the rules for writing chemical formulas?
The rule for writing chemical formula is as follow: Firstly, write the symbols with positive charge valency first. Secondly, write the valency of each atom on the top of its symbol. Thirdly, divide the valency number by their highest common factor ignore the positive or negative radicle.
What are the three rules for naming compounds?
Rules for Naming Molecular Compounds Write the name for both elements. Change the ending of the second element to ide. Place prefixes in front of each element based on the number of atoms present. The prefix ‘mono’ is only used on the second non-metal in the chemical formula.
How do you name each compound?
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. For example, KCl, an ionic compound that contains K+ and Cl- ions, is named potassium chloride.
How do you name acids?
The acid name begins with the prefix hydro-. followed by the base name of the anion, followed by the suffix -ic. Formula for naming acids: Hydro- and Base name of nonmetal and -ic + acid. Example: HCl is hydrochloric acid.
When naming a compound which is written first?
A molecular compound is usually composed of two or more nonmetal elements. Molecular compounds are named with the first element first and then the second element by using the stem of the element name plus the suffix -ide. Numerical prefixes are used to specify the number of atoms in a molecule.
Can you name an element after yourself?
The Swedish village of Ytterby has managed to get four named after it (ytterbium, yttrium, erbium and terbium). No-one has yet named an element after themselves but many elements are named in tribute to important scientists.
How do you name metals and metals?
The name of the metal is written first, followed by the name of the nonmetal with its ending changed to –ide. For example, K2O is called potassium oxide. If the metal can form ions with different charges, a Roman numeral in parentheses follows the name of the metal to specify its charge.
How do you name a metalloid?
The nonmetals are hydrogen, helium, carbon, nitrogen, oxygen, fluorine, neon, phosphorus, sulfur, chlorine, argon, selenium, bromine, krypton, iodine, xenon and radon. The metalloids are boron, silicon, germanium, arsenic, antimony, tellurium, polonium, and astanine.
How do you name cations?
How are the elements named?
Elements have been named after a number of things including their attributes, the compound or ore from which they were isolated, how they were discovered or obtained, mythological figures, places, and famous people. Some elements have descriptive names based on an attribute of the element.
What are the 3 types of chemical formula?
There are three main types of chemical formulas: empirical, molecular and structural. Empirical formulas show the simplest whole-number ratio of atoms in a compound, molecular formulas show the number of each type of atom in a molecule, and structural formulas show how the atoms in a molecule are bonded to each other.
What are the 4 rules for naming ionic compounds?
- Name the metal by its elemental name.
- Name the nonmetal by its elemental name and an -ide ending.
- Name metals that can have different oxidation states using roman numerals to indicate positive charge. Example Fe2+ is Iron(II)
- Name polyatomic ions by their names.
How do you write names and formulas?
How do chemical names work?
The name of the metal is written first, followed by the name of the nonmetal with its ending changed to –ide. For example, K2O is called potassium oxide. If the metal can form ions with different charges, a Roman numeral in parentheses follows the name of the metal to specify its charge.
How do you name compounds for dummies?
The name of a compound with two elements has two words. To get the first word we use the name of the first element, or the element to the left of the formula. To get the second word we use the name of the second element and change the suffix to “ide” at the end of the word.
How are bases named?
Names and Formulas of Bases There is no special system for naming bases. Since they all contain the OH− anion, names of bases end in hydroxide. The cation is simply named first.
How are bases usually named?
There is no special system for naming bases. Since they all contain the OH- anion, names of bases end in hydroxide. The cation is simply named first.
Is milk a base or an acid?
Milk — pasteurized, canned, or dry — is an acid-forming food. Its pH level is below neutral at about 6.7 to 6.9. This is because it contains lactic acid.
How do you memorize compound names?
You can remember these names by referring to their symbols. Determine if the cation has two possible charges. If so, name cations with the lower charge with the suffix “-ous” and the higher charge with the suffix “-ic.” For example, Cu+ is cuprous, Cu2+ is cupric. Fe2+ is ferrous, Fe3+ is ferric.