Question

Sodium is an element in the periodic table which is a metal as it has a net positive charge. The valency of this element is +1. It can donate an electron to achieve the octet and hence stability. What are chemical elements? Chemical elements are the substances which cannot be decomposed into further simpler substances by any ordinary chemical process. These are presented in the periodic table on the basis of their atomic number. Sodium is an element which belongs to the alkali metals family. Sodium element can be denoted by the symbol Na. The element is a metal as it has a net positive charge. It can donate one electron from its valency shell to achieve the octet which gives it stability. Therefore, the valency of the element is 1. The element has 11 protons, 11 neutrons and 11 electrons. This can be represented as: ¹¹Na₂₂ where, Na is the symbol of sodium 11 is the atomic number = number of protons in the element 22 is the atomic mass = number of protons+ number of neutrons in the element.

Answer 1

That is correct. Chemical elements are the fundamental building blocks of matter and cannot be broken down into simpler substances by ordinary chemical means. They are arranged in the periodic table based on their atomic number, which is the number of protons in the nucleus of an atom of that element. Sodium is an element with the symbol Na, and it is a metal belonging to the alkali metal group. It has a valency of +1, which means it can donate one electron from its outermost shell to achieve stability and form chemical compounds. The atomic number of sodium is 11, and the atomic mass is 22, which is the sum of the number of protons and neutrons in the atom.