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Colloid

In surface chemistry, the word colloid refers to a colloidal solution which is an intermediary between true solution and suspension.

5 min read

Adsorption

In absorption, a substance enters another substance and gets distributed uniformly throughout the 2nd substance.

5 min read

Chemistry Formulas

A compound comprises two or more than elements, and the chemistry formula reveals the number of atoms present in each component. The chemical formula contains symbols of the element’s atoms in the compound. It also reflects the number of atoms present in each element.

5 min read

Dmitri Mendeleev (1834–1907)

Dmitri Mendeleev was one of the great chemists of the 19th century. He correctly predicted the properties of more than three undiscovered elements. His contributions to chemistry won him the title of the father of the modern periodic table.

7 min read

Honorable Robert Boyle (1627–1691)

Robert Boyle was a chemist of the 17th century and a founder of the modern chemistry.

8 min read

Law of Conservation of Matter

The law of conservation of matter is a fundamental law in science. It is also known as the law of conservation of mass. The later is used in physics while the former in chemistry. It is one of the laws of chemical combinations in chemistry. The law has huge applications in chemistry, physics, and engineering. In a closed system, the exchange of matter is restricted across its boundaries. So, there is no matter entering the system or leaving the system. Thus, the flow of matter in and out of the system is zero. These statements are true only for a closed system with no nuclear change. We can apply the law to systems which are subjected to physical and chemical changes, not nuclear changes. This will be better understood as we go through the article.

6 min read

Accuracy and Precision in Chemistry

Accuracy refers to the closeness between the measured value and actual value of a quantity. While precision indicates closeness among the measured values of a quantity. Accuracy indicates how much the measured value agrees with actual value, and precision indicates how close the measured values agree among themselves. The results which are easily reproducible have good precision.

5 min read

Significant Figures in Chemistry

In chemistry, we may deal with different varieties of calculations. Sometimes, we may come across very large numbers like Avogadro’s constant (NA = 6.022 × 1023 mol−1), or sometimes, with very small numbers like the diameter of hydrogen (120 pm). Many times, chemistry experiments involve the handling of large experimental data like vapour pressure data. So, there is a need for the right technique to manage numbers conveniently and maintain the accuracy of numbers. This is where the concept of significant figures arises.

11 min read

SI Units Rules and Style Conventions

To maintain consistency in SI units, the International System of Units has adopted specific rules and style conventions for writing SI units. General rules for writing SI units were first specified by the 9th CGPM in 1948. Later, various international bodies like ISO extended these rules. These rules are very important in scientific writing. Adherence to these rules is strictly recommended while submitting and reviewing a manuscript. The general guidelines are described below.

7 min read

Lists of SI units

The SI stands for the International System of Units or Le Systeme International d’Unités (in French). It is the modern system of measurement. The article lists some of them.

6 min read

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