Protons Define Atomic Number
The atomic number ($Z$) of a chemical element is defined by the number of protons found within the nucleus of each atom of that element.
This number is unique to each element and determines its position in the periodic table.
While the nucleus also contains neutrons, and atoms possess electrons, it is the count of protons that fundamentally defines an element.
Thus, the atomic number represents the number of protons in the nucleus.
Similar Questions
- How many neutrons are present in protium?
- What is the electronic configuration of rhodium?
- Name the scientist who proposed that electrons are embedded in a positive sphere.
- Valence electrons are present in the:
- Isotopes are atoms that have the __________.
- The term 'Isotope' refers to:-
- There are three isotopes of hydrogen atom, namely Protium, Deuterium and Tritium. The respective atomic number and mass number of the isotope Tritium is:
- Atomic weight of an element is compared with which of the following to get the atomic weight of that element?
The discovery of the atomic nucleus by bombarding a thin gold foil with alpha particles is associated with which of the following scientists?
Two isotopes of an element have 17 protons with 18 neutrons and 20 neutrons, respectively. Which of the following is the correct representation of these isotopes?
Important Questions from Structure of Atom
Identify the element having zero valency
The atomic number of an element is 8. How many electrons will it gain to form a compound with sodium?
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
What is the atomic number of nitrogen?
What are isobars?
