Author: misamaliraza94
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Ionic Compound and Crystal Lattice
The crystal lattice is an ordered arrangement of an ionic compound which is pictured as a three-dimensional aggregation of negative and positive ions. There exists a charge balance between the negative and positive ions in a crystalline solid. The enthalpy of lattice formation stabilizes the crystal lattice.
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What Is Covalent Bonding
Lewis was the first to provide a description of covalent bonding based on the electron pair between atoms. Importance of Lewis dot symbol and Lewis Dot Structure are: Lewis dot symbol manifests the number of valence electrons of the atoms for given elements Lewis dot structure gives a pictorial representation of molecular bonding
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Introduction
The insight by Kossel’s about the mechanism of formation of electronegative and electropositive ions interconnected the process of attaining noble gas configuration by corresponding ions. They are stable due to the electrostatic attraction of allying ions. Hence gives rise to a concept called electrovalency.
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FAQs
How many elements are present in the periodic table? A total of 118 elements are present in the periodic table. What is the meaning of ionisation enthalpy? The enthalpy change associated with the removal of the original electron from an atom with a single gas in its ground surface is called as the first ionization…
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Few Important Questions
What is the difference between Modern Periodic Law and Mendeleev’s Periodic Law? What is the ionic radius? What is the atomic radius? What is isoelectronic species? Give an example. Elements in the same group have similar chemical and physical properties.
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Introduction
In this chapter, we will discuss the development of the periodic table and the periodic law. The arrangement of elements in the modern periodic table is organized into eight vertical columns (groups) and seven horizontal rows (periods) based on their atomic number. Based on the electronic configuration, elements can be classified into four types in…
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Few Important Questions
1. Calculate the wavenumber and frequency for the below: Yellow light emitted from a sodium lamp has a wavelength (λ) of 580 nm 2. Calculate and provide the number of electrons for the following: H+2 O+2 H2 3. Calculate the wavelength using the following details: Mass of electron is 9.1 × 10–31 kg and K.E. is…
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Common terminologies used
Electrons – These subatomic particles orbit around the nucleus. They are negatively charged particles and found in definite energy levels orbiting the nucleus. Protons – Theses subatomic particles are found in the nucleus. They are positively charged particles and belong to the nucleons group. Neutrons – Theses subatomic particles are found in the nucleus. They…
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Introduction
As discussed in the previous chapter, according to Dalton’s atomic theory, atoms are the building blocks of matter. In the year 1808, John Dalton proposed atomic theory saying that atom is an indivisible particle of matter. By the end of the nineteenth century, experiments proved that atoms comprise of three particles viz protons, neutrons, and…
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FAQs
How to make the subject Chemistry easy for children? Chemistry involves many equations and thus conceptual teaching can help students develop interest towards this subject. What is matter? Anything has occupies space and has mass can be defined as matter in Chemistry. Should a student be good in Maths to solve the CBSE Class 11…