Skip to main content

Atomic number and mass number

 Hello My dear Readers! 

Hopefully you all are fine and also doing experiments in your life. Let's start our today's topic. Today we will discuss atomic number and mass number. 

Atomic number:

The number of protons present in the nucleus of its atom is called atomic number. Atomic number is represented by 'Z'. All the atoms of an element have same number of protons in their nuclei so thay have same atomic number. Each individual element has specific atomic number that is called identification number. For example hydrogen have 1 proton so it's atomic number is Z=1. In oxygen all atoms have 8 protons, have atomic number Z=8. 

Mass number:

It is the sum of number of protons and number of neutrons present in the nucleus of an atom. It is represented by 'A'. 
It is calculated as:
        A=Z+n
Where n is number of neutrons. 
For example: hydrogen atom has on proton and no neutron in its nucleus, its mass number A = 1 + 0 = 1 . Carbon atom has protons and 6 neutrons, hence its mass number A = 12.


This was the short view of atomic number and mass number. I hope you get the concept. See you soon. Thank you. 

Comments

  1. AnonymousNovember 12, 2022 at 10:35 AM

    Well-done! More achievements are yet to come! Keep working.

    ReplyDelete

Post a Comment

Popular posts from this blog

Oxygen Cycle

It involves the inter- change of oxygen between the elemental form of gaseous O2, contained in a huge reservoir in the atmosphere, and chemically bound O in CO2, H2O, minerals, and organic matter. It is strongly tied with other elemental cycles, particularly the carbon cycle. Elemental oxygen becomes chemically bound by various energy-yielding processes, particularly combustion and metabolic processes in organisms. It is released in photosynthesis. This element readily combines with and oxidizes other species such as carbon in the process of aerobic respiration, or carbon and hydrogen in the combustion of fossil fuels such as methane: CH4 +  2O2    →   CO2    +  2H2O Elemental oxygen also oxidizes inorganic substances such as iron(II) in minerals: 4FeO4   +   O2   →    2Fe3O3 A particularly important aspect of the oxygen cycle is stratospheric ozone O3. A relatively small concentration of ozone in the strato...
Post a Comment
Read more

Branches of chemistry part 3

Hello readers!  We have already discussed main branches of chemistry. Today we will discuss further.  Agro Chemistry: It examines chemical processes important to agriculture. It includes pesticides, herbicides, fungicides and seed treatment.  Forensic Chemistry: It can be defined as practice of application of our knowledge in field of chemistry to solve crimes. Most common methods used are spectroscopy and chromatography.  Astro Chemistry: It is the study of chemical reaction in space. This discipline is an overlap of chemistry and astronomy.  Coordination Chemistry: It is the study of coordination complexes, consists of central metal atoms mostly and surrounded by ligands.  Medicinal Chemistry: It is the intersection of chemistry especially synthetic organic chemistry. Medicinal chemistry designs, synthesized and studies drugs and other therapeutic agents.  Geo Chemistry: The study of chemical composition of rocks, minerals, atmosphere of Earth and ot...
15 comments
Read more

Branches of chemistry Part 2

 Hello!  Previously we have discussed five main fields of chemistry. Today we will discuss other disciplines of chemistry.  Industrial Chemistry: The branch which deals with the manufacturing of chemical compounds on commercial scales is called industrial chemistry. It deals with the manufacturing of various raw materials for various industries such as fertilizer, soap, textile, agriculture product, paints and paper etc.  Environmental Chemistry: It is the branch which deals with the study of components of environment and effects of human activities on the environment. The knowledge of chemical process taking place in environment is necessary for its improvement and protection against pollution.  Nuclear Chemistry: It is the branch of chemistry which deals with the radioactivity, nuclear processes and properties. It's main concern is with atomic energy and it's uses in daily life. It also has vast applications in medical treatment, preservation of food and gener...
6 comments
Read more