Boron has atomic number 5 and mass number 5+6=11. Therefore, K shell will accommodate 2 electrons and L shell will accommodate remaining... View Article
Air is a mixture of several gases, where the two most dominant components in dry air are 21 vol% oxygen and 78 vol% nitrogen, Argon: 0.934% and... View Article
The number of oxygen electrons = 8 Here Oxygen gained 2 electrons and form O2- Therefore, the electrons in O2- will be 8+2=10 Electronic... View Article
The valency of an element is the number of hydrogen atoms that can combine with or replace (either directly or indirectly) one atom of the... View Article
The abundance is written as 78.99% of 23.98504 u10.00% of 24.98584 u11.01% of 25.98259 u (0.7899 x 23.98504) + (0.100 x 24.98584) + (0.1101 x... View Article
The Molar mass of Mg = 24.3 g/mol and Cl = 35.5 g/mol we have two chorine atoms in this particular molecule, we simply multiply the molar mass of... View Article
The S.I. unit of power is watt. Power, P = W/t Here, W stands for Work and t for time. Thus, the SI unit of power is the watt (W), which is equal... View Article
Hydrogen almost always has an oxidation number of +1. A rarely-encountered exception is when H is bound to a metal in a hydride compound. the SUM... View Article
Fluorine is located in period 2, group 17 in the periodic table and has an atomic number of 9. neutral fluorine atom has a total of 9 electrons... View Article
Atomic number of aluminium = 13. Therefore, number of electrons = 13. The first two electrons will go in the 1s orbital. Since 1s can only hold... View Article
The periodic table has eight main groups: 1, 2, 13, 14, 15, 16, 17, and 18 ( Ia, IIa, IIIa, IVa, Va, VIa, VIIa, and 0, respectively). Each group... View Article
Complex ions containing transition metals are usually coloured, whereas the similar ions from non-transition metals are not coloured. The reason... View Article
Chlorine is a non-metal. Metals are good conductors of heat and electricity, and are malleable. Non-metals are (usually) poor conductors of heat... View Article
Projectile motion is a form of motion where an object moves in a bilaterally symmetrical, parabolic path. The path that the object follows is... View Article
When we write the electron configuration for Silicon the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the... View Article
Identify the central atom Count its valence electrons Add one electron for each bonding atom Add or subtract electrons for charge Divide... View Article
Potassium is a chemical element with symbol K and atomic number 19. The Atomic mass of Potassium is 39.0983 To calculate Molar Mass, multiply the... View Article
Occlusion means the absorption of a substance from a gaseous medium by solids or melts. During occlusion, gases are absorbed by the entire volume... View Article
An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. In a diploid organism, one that... View Article
The atomic number of zinc is 30, that says that all zinc atoms have 30 protons in their nuclei. The electron configuration of a neutral zinc atom... View Article
