Chemical Formula Of Compounds Name And Formula Pdf

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Chemical compound names and formula can be very complex.

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Think about what you call your friends. Some of your friends might have full names long names and a nickname short name. These are the words we use to tell others who or what we are referring to. Their full name is like the substances name and their nickname is like the substances formulae. Without these names your friends would have no idea which of them you are referring to. Chemical substances have names, just like people have names. This helps scientists to communicate efficiently. It is easy to describe elements and mixtures.

We simply use the names that we find on the periodic table for elements and we use words to describe mixtures. But how are compounds named? In the example of iron sulfide that was used earlier, the compound name is a combination of the names of the elements but slightly changed.

The compound name will always include the names of the elements that are part of it. In a compound, the element that is on the left of the Periodic Table, is used first when naming the compound.

Sodium therefore comes first in the compound name. The symbols of the elements can be used to represent compounds e. These are called chemical formulae. In the first three examples, the ratio of the elements in each compound is A compound may contain ions an ion is an atom that has lost or gained electrons. These ions can either be simple consist of only one element or compound consist of several elements.

Some of the more common ions and their formulae are given in Table 2. You should know all these ions. Prefixes can be used to describe the ratio of the elements that are in the compound. This is used for non-metals. Later, when we start looking at chemical equations, you will notice that sometimes there are numbers before the compound name.

The above guidelines also help us to work out the formula of a compound from the name of the compound. The following worked examples will look at names and formulae in detail. We can use these rules to help us name both ionic compounds and covalent compounds.

However, covalent compounds are often given other names by scientists to simplify the name or because the molecule was named long before its formula was discovered. For example, if we have 2 hydrogen atoms and one oxygen atom the above naming rules would tell us that the substance is dihydrogen monoxide. But this compound is better known as water!

Some common covalent compounds are given in Table 2. You can look these up on the tables of cations and anions. For every plus, we must have a minus. There is an easy way to find this ratio:. This ratio must always be in simplest form, i.

Your teacher will assign each of you a different ion written on a piece of card. Stick this to yourself. Now walk around the class and try to work out who you can pair up with and in what ratio. Once you have found a partner, indicate your ratio using the numbered cards. Check your results with your classmates or your teacher. Siyavula Practice gives you access to unlimited questions with answers that help you learn. Practise anywhere, anytime, and on any device!

Find the right combination For every plus, we must have a minus. List the ions involved. Find the right combination. Do you need more Practice? Sign up to practise now. Exercise 2. Give a reason for your answer. Give the name of each of the following substances. Give the chemical formula for each of the following compounds.

3.1: Types of Chemical Compounds and their Formulas

Calcium bromide — CaBr2. Determine the formula of the following compounds: Aluminum oxide — Al2O3. Let us help you simplify your studying. Put the two names together, metal first and that's it - you've named a ternary ionic compound. Common compound names.

Search for Species Data by Chemical Formula

Chemical nomenclature , replete as it is with compounds with complex names, is a repository for some names that may be considered unusual. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and Physics a fundamental resource will reveal not just the whimsical work of chemists , but the sometimes peculiar compound names that occur as the consequence of simple juxtaposition. Some names derive legitimately from their chemical makeup, from the geographic region where they may be found, the plant or animal species from which they are isolated or the name of the discoverer. Some are given intentionally unusual trivial names based on their structure, a notable property or at the whim of those who first isolate them. However, many trivial names predate formal naming conventions.

Think about what you call your friends. Some of your friends might have full names long names and a nickname short name. These are the words we use to tell others who or what we are referring to. Their full name is like the substances name and their nickname is like the substances formulae. Without these names your friends would have no idea which of them you are referring to.

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The atoms in all substances that contain multiple atoms are held together by electrostatic interactions—interactions between electrically charged particles such as protons and electrons. Electrostatic attraction between oppositely charged species positive and negative results in a force that causes them to move toward each other, like the attraction between opposite poles of two magnets. In contrast, electrostatic repulsion between two species with the same charge either both positive or both negative results in a force that causes them to repel each other, as do the same poles of two magnets. Atoms form chemical compounds when the attractive electrostatic interactions between them are stronger than the repulsive interactions. Collectively, the attractive interactions between atoms are called chemical bonds. Chemical bonds are generally divided into two fundamentally different types: ionic and covalent. In reality, however, the bonds in most substances are neither purely ionic nor purely covalent, but lie on a spectrum between these extremes.

The empirical and molecular formulas discussed in the preceding section are precise and informative, but they have some disadvantages. First, they are inconvenient for routine verbal communication. In such cases, it is necessary for the compounds to have different names that distinguish among the possible arrangements.

List of Chemical Formulas and their Common Names – GK Notes for SSC

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Think about what you call your friends. Some of your friends might have full names long names and a nickname short name. These are the words we use to tell others who or what we are referring to. Their full name is like the substances name and their nickname is like the substances formulae. Without these names your friends would have no idea which of them you are referring to.

In the GCSE exams, chemical formulae are often given to you in the question. Remember our top three tips for each type of compound… and writing chemical formulae will never be a problem again! First off, decide if the compound is covalent or ionic. Remember that covalent bonding happens when all the elements in a molecule are non-metals e. The name starts with the atom at the centre of the molecule, and then tells you how many of the other elements there are.

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A chemical compound is a chemical substance composed of many identical molecules or molecular entities composed of atoms from more than one element held together by chemical bonds.

4 Response
  1. Stephanie S.

    If you keep an eye on the latest trend followed by SSC for General Awareness questions , you would notice that Science facts are covering major portions of it.

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