Periodic Classification and Elements

Carborundum is the common name for silicon carbide (SiC). It is a hard compound used as an abrasive.

Isotones are atoms that have the same number of neutrons. For Si (30-14=16), P (31-15=16), and S (32-16=16), all have 16 neutrons.

Carbon's ability to form stable covalent bonds with hydrogen and other carbon atoms allows it to form a vast array of hydrocarbons and organic compounds.

Chalcophiles, lithophiles, siderophiles and atmophiles are classes of elements, based upon similar geochemical properties, and reactive affinities. The classes were originally advanced, by Swiss-born Victor Goldschmidt (1888-1947) and are terms still widely used by geologists and geochemists. The key factor in determining an element's class, is the type of chemical bonds that the element forms.

Lithophiles have a high bonding affinity with oxygen. Lithophiles have an affinity to form ionic bonds and are represented by silicates (silicon and oxygen) in the crust and mantle. Other lithophile elements include magnesium, aluminum, sodium, potassium, iron and calcium.

Sulphur is a non- metal used to prepare sulphur drugs and sulphur compounds like, sulphuric acid, sulphur dioxide matches,  vulcanized rubber, dyes and gunpowder.

Inner transition elements consist of the lanthanide series (14 elements) and the actinide series (14 elements), totaling 28 elements in the f-block of the periodic table.

Ans : 1.

In the first partition of Quick sort using 66 as the pivot, 66 is placed in its final sorted position.

Chemical elements generally do not take a definite or indefinite article when referred to in a general sense. 'Hydrogen' is the correct noun to use as the subject.

The f-subshell has 7 orbitals, and since each orbital can hold 2 electrons, the f-subshell can accommodate a maximum of 14 electrons.

The chemical behavior of an element is primarily determined by the arrangement of its electrons in shells, specifically the valence electrons.

Diamond is an allotrope of carbon, which is a chemical element. Ruby, sapphire, and emerald are mineral varieties (compounds/mixtures).

The physical and chemical properties of the elements are periodic functions of their atomic numbers.So modern periodic table is based on atomic number.

The elements of the 3^rd period are representative elements [Na (Z = 11) to Ar (Z = 18)] as each of them is a representative of its group.