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The essence of a calibration plot is the linear relation between two variables. How do you decide the degree of linearity to rely on interpretations based…
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Pure substances are defined as substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together). The m…
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Most materials in our surroundings are mixtures of two or more components that can be physically seperated
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The periodic table arranges all of the known elements in order of increasing atomic number. Order generally coincides with increasing atomic mass. The d…
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A pattern of repeating order is called periodicity . In the mid-1800s, Dmitri Mendeleev, a Russian chemist, noticed a repeating pattern of chemical proper…
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Most of us were exposed to chemical calculations in school and college days. As we pursued higher degrees and progressed in our career as analytical sc…
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There are several differences between a physical and chemical change in matter or substances.
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The unified atomic mass unit (symbol: u) or dalton (symbol: Da) is the standard unit that is used for indicating mass on an atomic or molecular scale (ato…
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Atom An atom is the smallest particles of an element that retains the chemical properties of the element. So we're talking some super-tiny stuff h…
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In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structur…
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Alkaline Earth Metals Elements beryllium barium magnesium radium calcium strontium Table 2.1 …
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Relative Atomic Mass In chemistry, it is important to quantify particles. For the fact that the size of an atom is too small to be weighed practically, re…
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The atom is the smallest part of matter that represents a particular element. For quite a while, the atom was thought to be the smallest part of matter …
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Rutherford's alpha particle scattering experiment changed the way we think of atoms. Before the experiment the best model of the atom was known as …
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Nature Matter is anything that has mass and occupy space (Volume). All matter is made of atoms composed of protons, neutrons, and electrons. The cente…
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Image credit: slideshare Molecular mass or molecular weight is the mass of a molecule. It is calculated as the sum of the atomic mass of each constitu…
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The Bohr Model has an atom consisting of a small, positively-charged nucleus orbited by negatively-charged electrons. Here's a closer look at the Bohr…
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The first is the experiment of Joseph John Thomson, who first demonstrated that atoms are actually composed of aggregates of charged particles. Prior to h…
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Some of the important postulates and limitation of Dalton’s atomic theory is given below : Major postulates of Dalton’s atomic theory are: (i) All…
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The International System of Units is the most widely used system of measurements and considered to be the standard system for science and industry. There …
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Material Safety Data Sheet or MSDS is a useful resource of information on chemical properties, physical behaviour,hazard properties, handling and storage …
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Fire accidents in laboratories can cause immeasurable damage in terms of serious injuries to laboratory workers, damage to expensive instruments and labo…
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Laboratory chemicals are found commonly as solids, powders, gases, fumes and liquids. Your body is vulnerable to harm through exposure to chemicals when y…
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A laboratory houses several solvents which play diverse roles in analysis and synthesis activities. The quantities of such solvents in laboratories are of…
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If you love cooking with garlic, you know it does a lot of good in recipes by helping build flavor — but its strong odor can linger for hours, especially …
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Question: How Does Stainless Steel Remove Odors? Answer: One household tip for removing odors from fish, onions, or garlic from your hands is to…
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The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through …
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86 Solid elements of the periodic table irrespective of their atomic number but according to their atomic mas are displayed in the table
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The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium…
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Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element on the…
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A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are …
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