Elements,Their Occurrence and Extraction Worksheet
Elements,Their Occurrence and Extraction Worksheet All the materials found in the earth are composed of elements. There are about 112 elements known which constitute the entire matter on the earth. Therefore, the elements are regarded as the building blocks of the universe. These are distributed in all the three main parts of the earth; atmosphere and lithosphere. Among these, lithosphere constitutes the main source of most of the elements. The elements have been broadly divided into metals and non-metals on the basis of their physical...
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Occurrence and Extraction of Elements Worksheet Here, we study about the occurrence and extraction of elements. Mainly we mention the occurrence and extraction of metals. Occurrence means how and where the elements are found in earth and extraction mean how we can use these metals in our daily life by separate these elements from their combine state . Generally, all the elements are in the form of sulphides, oxides, carbonates, chlorides etc. the nature material in which the metals or their compounds occur on the earth are called...
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Hydrogen Compounds Worksheet Hydrogen is the first element in the periodic table. The nucleus of the hydrogen atom contains one proton and no neutron. The atom has one planetary electron present in the K—shell. Hydrogen resembles with the alkali metals of I-A group (can lose an electron). It also resembles with halogens of VII-A group (can gain an electron). But it has been alloted a separate and distinct place unassociated with any particular group as the first element at the head of the periodic table. Hydrogen together with oxygen...
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Hydrides Worksheet The binary compounds of hydrogen are termed as hydrides. These are classified as follows: (i) Ionic hydrides: The elements of group IA, IIA (except Be and Mg) and the lanthanides form ionic hydrides. These metals form hydrides of the type where x is the group valency of the metal M. (ii) Covalent hydrides: Most of the p-block elements form covalent hydrides. They also show partial ionic character. Some of these hydrides contain bridging hydrogen. The general formula of such type of hydrides is where n...
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Hydrogen Peroxide Worksheet Hydrogen peroxide [Oxyenated Water] is the simplest peroxide (a compound with an oxygen-oxygen single bond). It is also a strong oxidizer. Hydrogen peroxide is a clear liquid, slightly more viscous than water. In dilute solution, it appears colorless. Due to its oxidizing properties, hydrogen peroxide is often used as a bleach or cleaning agent. The oxidizing capacity of hydrogen peroxide is so strong that it is considered a highly reactive oxygen species. Hydrogen peroxide is therefore used as a propellant...
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Water Worksheet Water contains only hydrogen and oxygen atoms in the ratio 2 : 1 hence its molecular formula is . Pure water is bad conductor of electricity due to very low degree of ionisation. Its density is maximum at 4°C. Density of ice is less than that of water due to hydrogen bonding therefore ice floats on water. It reacts with the elements placed above hydrogen in electrochemical series to give hydrogen gas under different temperatures (according to the activity of the element) water acts both as oxidising and reducing...
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Hydrogen Isotopes Worksheet Atoms of the same element can have different numbers of neutrons; the different possible versions of each element are called isotopes. Hydrogen has three known isotopes – two stable and one unstable. Hydrogen isotopes protium and deuterium are stable. The third isotope tritium , the heaviest of the three isotopes with a nucleus having one proton and two neutrons – is unstable. Here, you can find some question related with “Hydrogen Isotopes” and also their answers: 1. The...
read morePeriodic Table and Functions Worksheet
Periodic Table and Functions Worksheet The periodic table is a tabular display of the chemical elements, organized on a basis of their properties. Elements are presented in increasing atomic number; while rectangular in general outline, gaps are included in the rows or periods to keep elements with similar properties together, such as the halogens and the noble gases, in columns or groups, forming distinct rectangular areas or blocks. Because the periodic table accurately predicts the properties of various elements and the relations...
read moreAcidic and basic nature of oxides Worksheet
Acidic and Basic Nature of Oxides Worksheet A binary compound of oxygen with another element is called oxide. On moving left to right in a period acidic nature of oxides and hydroxides increases and basic nature decreases. Basic nature of hydroxides decreases on moving down the group. Acidic nature of oxides or hydroxides decreases while basic nature increases. (i) Basic oxides: Alkali, alkaline earth and transition metals form basic oxides - etc. their relative basic character decreases in the order :alkali metal oxides>alkaline earth...
read moreElectronegativity and Valency Worksheet
Electronegativity and Valency Worksheet The ability of an atom to attract bond pair of electrons in a molecule is referred to as electronegativity. The relative electronegativity is measured by considering: (i) The ionisation energy and electron affinity of the combining atoms. (ii) The energy required to break a bond. (iii) The dipole moment of the resultant molecule. Valency is the power of an atom of an element to combine with other atoms...
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