Distinguish between the following-1. Valency and valence shell
2. Atomic number and mass number
3. Atom, molecule, and polyatomic ion
4, Valency and atomicity
5. Chemical symbol and chemical formula
Answers
Answer:
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Explanation:
The combining capacity of an atom is known as its valency. ... We all know how electrons in an atom are arranged in shells/orbitals. Valence electrons are those electrons which are present in the outermost orbit of the atom.
Answer:
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Explanation:
1. Valence electron is simply the total number of electrons present in outermost shell of an atom. Valency is the number of electrons an atom looses,gains or shares with other atoms in order to get a stable configuration.
2. Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus.
3. According to science atom is the smallest unit of an element that can or cannot exist freely. While on the other hand, a molecule is a set of atoms that are held together with the help of a bond and is the smallest unit of a compound. ... Moreover, an atom contains a nucleus (made up of neutrons and protons) and electrons.
4. Atomicity refers to Total number of atom present in a one molecule of an element. Valency refers to the no. of electrons present in an outermost shell of an element. ... = According to electronic configuration of Na(sodium), the valency is 1 because it have 1 electron in an outermost shell.
5. A chemical symbol is a one- or two-letter designation of an element. ... Compounds are combinations of two or more elements. A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.
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