The stock system uses roman numerals in parenthesis to indicate the charge of the. Chemical formulas nomenclature san jacinto college. Nacl is sodium chloride, li 2 o is lithium oxide, kbr is potassium bromide, mgi 2 is magnesium iodide, sodium nitride is na 3 n, calcium bromide is cabr 2. Includes pdf and word document for easy modification. Atoms of elements are not chemically stable until they have 8 valence electrons octet rule. Please click here for a pdf version of this tutorial. Jan 27, 2020 naming binary twoelement molecular compounds is similar to naming simple ionic compounds. Chemical formulas also allow chemists to calculate a number of characteristic values for a given compound. This product consists of 4 short documents on writing formulas and naming compounds. Dec 07, 2016 2 page flow chart to write names and formulas for ionic and covalent chemical compounds with examples.
In this section, you will learn how to use chemical formulas to calculate the formula mass, the molar mass, and the percentage composition by mass of a compound. Chemical compounds an atom consist of a positively charged nucleus protons and neutrons and orbiting electrons. Formula 22 sodium phosphide na 3 p 23 magnesium nitrate mgno 3 2 24 lead ii sulfite pbso 3 25 calcium phosphate ca 3 po 4 2 26 ammonium sulfate nh 4 2 so 4 27 silver cyanide agcn 28. Covalent compounds classifying compounds the system for naming an ionic compound is different from that for naming a covalent compound, so before a compound can be named, it must be classified as ionic or covalent. Chemistry lesson02 naming compounds holy trinity academy. Ionic compounds chemical formula naming and writing. Notice that the formulas for both types of compounds can look very similar, even though their names are quite different. A chemical formula for an ionic compound is electrically neutral. C 8 h 18 nh 4 there are 8 carbon atoms there is 1 nitrogen atom and 18 hydrogen atoms. Atoms gain, lose or share electrons with other atoms to be come chemically stable have 8 valence electrons. Naming and writing formulas for chemical compounds flow. Chemical elements, periodic table compound name formula search moles to grams calculator common compounds list chemical equation balancer complete list of acids complete list of bases molar to mass concentration converter molar mass calculator cations, anions list dilution calculator molarity calculator compound prefixes. Naming ionic compounds an ionic compounds name must distinguish it from other compounds containing the same element. Naming molecular compounds 5 extension questions 19.
Chemical formulae and equations derivation of formulae key points chemical formula definition. Consolidate and extend students can test their understanding of the material in this section by completing the questions in the interactive resource naming nonionic. The first box is the intersection between the zinc cation and the chloride anion, so. This activity focused on molecular covalent compounds, while an earlier activity addressed ionic compounds. The names are found by finding the intersection between the cations and anions. If there is no subscript, you assume there is a 1 as the subscript but you just dont write it in. Nomenclature is the process of naming chemical compounds with different. Ionic compounds ionic compounds are comprised of positive and negative ions. I most often use these documents as short, daily quiz. When an element can have multiple charges, we must use the stock system. An expression which states the number and type of atoms present in a molecule of a substance. Worksheet number one 1a to 1g are 50 question portions from the pdf file, but are done in.
Although the account which follows describes in considerable detail the selection of substance names for chemical abstracts ca indexes, it is not a nomenclature manual. Their names and formulas reflect the number of hydrogen ions or hydroxide ions they contain. Since we use different methods in naming binary covalent molecular compounds and ionic compounds, the first step in naming or writing the formula of a. Write the symbol and charge of the cation first positive ion. Module 7 writing names and formulas moorpark college. The first part of the ionic compound name is simply the name of the cation. Chemical formula writing worksheet solutions write chemical formulas for the compounds in each box. Naming binary twoelement molecular compounds is similar to naming simple ionic compounds.
Naming common acids memorize the names and formulas of these acids hydrochloric acid hcl sulfuric acid h 2 so 4 nitric acid hno 3 acetic acid hc 2 h 3 o 2 phosphoric acid h 3 po 4 carbonic acid h 2 co 3 ammonia nh 3 not an acid 11. Classifying a compound is not an easy task, but for the. Binary compounds can be divided into two basic types. Binary ionic compounds compound made from only two elements when naming a binary ionic compound, the cation is first followed by the anion. In chemical formulas and names for ionic compounds, the cation is written first and the anion is written to its right. Writing chemical names and formulas ionic contains one metal naming 1. Derive substance names from chemical formulas, and chemical formulas from substance names. Naming chemical compounds answers name the following ionic compounds. Ionic bonds bonding between a metal and nonmetal or the bond between a positive ion and a negative ion forming a binary compound. Naming covalent molecular compounds well learn how to write names for compounds that are made of two nonmetals, sometimes called binary compounds. Naming and indexing of chemical substances for chemical. Identify the following compounds as ionic compound or covalent compound, write the formula.
Naming of chemical substances begins with the names of the elements. Write the positive ion, with its charge, then the negative ion, with its charge. For binary molecular compounds, name the compound after the elements it is made up of, using the appropriate prefix to indicate the number of atoms of each element. The formula mass of any molecule, formula unit, or ion is the sum of the average atomic masses of all the atoms represented in its formula. Naming chemical compounds answers name the follow ing ionic compounds. Answer key naming acids from chemical formulas honors chemistry formula of acid name of acid 1. Naming inorganic chemical substances prepared by m. How to read a formula a chemical formula uses symbols for each element subscripts to tell you how many of each element there are. Naming and writing formulas for ionic compounds using. Chemical formulas such as hclo4 can be divided into empirical formula, molecular formula, and structural formula. Chemical formulas some common examples given below chemical formula name importance o2 oxygen gas necessary for animal life co carbon monoxide prevents you from getting o2 because co binds to fe in the hemoglobin in red blood cells co2 carbon dioxide necessary for plant life to produce sugars ch4 methane gas natural gas, burn for energy. We will begin with the rules for elements, binary covalent compounds, ions, and binary ionic compounds. For example, organic compounds include molecules with carbon rings.
Write the formulas of the following chemical compounds. The first element in the formula is simply listed using the name of the element. Binary compound metalnonmetal with fixed charge cation. Ionic compounds are composed of a metal and a nonmetal positive and negative ions a chemical formula shows the kinds and numbers of atoms in the ionic compound. Chemical formula type of compoundbonding compound name mgf 2. Chemical formulas and naming compounds by amy brown. Learn naming chemical formulas with free interactive flashcards. A system of numerical prefixes is used to specify the number of atoms in a. The discoverer of an element has traditionally had the right to name it, and one can find some interesting human and cultural history in these names, many of which refer to the elements properties or to geographic locations. When naming anions, the name of the anion is changed by adding the suffix ide.
You can use this same method to determine the correct subscript when you are writing a chemical formula based on a name. Write the formulas for the following chemical compounds. However, they will give us a starting point for both naming compounds and writing formulas that indicate the composition and behavior of compounds. Chemical formulas nomenclature binary compounds binary compounds contain only two elements. The second element is named by taking the stem of the element name and adding the suffix ide. The isotope subrule if a comparison of atomic numbers fails to reveal a difference in the tree dia grams, the cip rule then compares mass numbers.
Metals characteristics have luster shiny can conduct electricity this is means that they are conductors ductile can be pulled out into a wire malleable can be hammered into thing sheets always lose electrons from their valance energy level to form positive ions or cations the roman numeral or numbers with an a beside them. How are the chemical formula and name of a molecular compound related. Chemistry chemical names formulas assessment answers. Neidig, lebanon valley college purpose of the exercise use a universal systematic method for naming inorganic chemical substances. Ap chemistry ion sheet chemical nomenclature you have a choice. Naming monatomic ions when naming cations, the name of the cation is the same as the metals name. Covalent compound compounds that consist of nonmetallic atoms only. Calculate the formula mass or molar mass of any given compound. Choose from 500 different sets of naming chemical formulas flashcards on quizlet. The following format is used for naming binary acids. For names and formulas that both identify and differentiate substances.
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