valence of br

It is the combining capacity of an element. It is the number of electrons in an atom that actually take part in bond formation. For example, carbon atom has 4 valence electrons. K L C (6) 2 ..

The members of group VA generally show trivalent character but nitrogen shows more than one valency ranging from +1 to +5. Example: Oxide of Nitrogen N 2 O NO N 2 O 3 NO 2 N 2 O 5 Name Nitrous Oxide Nitric Oxide Nitrogen Trioxide Nitrogen Dioxide Nitrog..

Elements of II nd period Li Be B C N O F Valence electrons 1 2 3 4 5 6 7 Hydrides LiH BeH 2 BH 3 CH 4 NH 3 H 2 O HF Valency with respect to hydro..

Noble Gases Noble gases are also known as inert gases and do not take part in chemical reactions. They have their outermost shell complete and thus remain stable. They do not generally combine with other substances, nor are they affected by oxidising agents or by reducing agents. They are placed..

All the elements belonging to 3 to 12 groups are called transition elements. They resemble each other in several physical and chemical properties. They are all metals. They are called transition elements because they are placed between the most reactive metals on the left and non-metals on the rig..

Where duplet is formed? A hydrogen atom has only one electron in its valence shell. It needs one more electron to fill its valence shell. The completed shell has the electronic arrangement of the noble gas helium, yet an octet is not completed. However we still get ..

Like all other first elements of the groups, oxygen also differs from its family members. The anomalous behavior of oxygen is due to its (i) small size (ii) high value of ionization energy and electronegativity (iii) absence of d-orbitals in the valence shel..

Factoids A chemical compound is always electrically neutral.The positive and negative valencies of the ions/radicals in a compound are equal and balance..

An oxygen atom has six electrons in its valence shell. As a result, it requires 2 more electrons to achieve the nearest noble gas configuration. When two oxygen atoms share two pairs of electrons this is achieved: ..

According to Mendeleev's periodic law, the physical and chemical properties of elements are periodic functions of their atomic mass Mendeleev was able to predict the existence of undiscovered elements like Ga, Sc and Ge Mendeleev corrected the atomic masses of a few elements on the basis of their p..