Asked by: Maryna Corbillonasked in category: General Last Updated: 10th February, 2020
How are elements classified in the modern periodic table?
Also, how are the elements classified in the periodic table?
Elements in the same group of the periodic table have similar chemical properties. Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals. Groups are numbered 1–18 from left to right.
Additionally, how do you identify the group of elements in the modern periodic table?
- For s-block elements , group number is equal to the number of valence electrons.
- For p-block elements ,group number is equal to 10+number of electrons electrons in the Valence shell .
- For d-block elements group number is equal to the number of electrons in a (n-1) d subshell + the number of electrons in Valence shell .
Secondly, what is the basis of classification of elements in modern periodic table?
Answer: The modern classification is based on the atomic number of the element. The periodic law state that the physical and chemical properties of the element are the periodic function of their atomic number. Therefore the variation in the properties of element is related with its electronic configuration.
What is atomic mass number?
The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. The mass number is different for each different isotope of a chemical element.