What Is an Atomic Number? Definition and Examples - Science …
2020年10月6日 · The atomic number is the number of protons found in the nucleus of an atom, which uniquely identifies its element. The atomic number is also called the proton number. It is denoted by the symbol Z and is the subscript in atomic notation. The symbol Z comes from the German word zahl, which means numeral, or atomzahl, which means atomic number.
Atomic number | Definition & Facts | Britannica
2024年11月22日 · Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in a neutral atom, is also the atomic number.
Atomic number - Wikipedia
Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of its atomic nucleus.
Atomic number Definition & Meaning - Merriam-Webster
2024年10月17日 · The meaning of ATOMIC NUMBER is an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table.
Atomic Number & Mass Number - Atomic Number Definition, …
What is Atomic Number & Mass Number - The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. Visit BYJU'S to learn more about atomic numbers.
Atomic Number - Definition, List, Examples, and FAQs
2024年2月22日 · Atomic number of an element refers to the number of protons present in its nucleus. It’s also called the nuclear charge number and is symbolized by Z. In a nonionized atom, the atomic number equals the number of orbiting electrons. The atomic number defines the identity of an element.
What is Atomic Number | How to Find it - Scienly
2024年9月17日 · The number of protons present in the nucleus of each atom of an element is called atomic number of an element. Generally, it is represented by the symbol “Z”. The concept of the atomic number was first introduced by the English physicist Henry Moseley in 1913.
Atomic Number Definition - Chemistry Glossary - ThoughtCo
2019年9月9日 · The atomic number of a chemical element is the number of protons in the nucleus of an atom of the element. It is the charge number of the nucleus since neutrons carry no net electrical charge. The atomic number determines the identity of an element and many of its chemical properties. The modern periodic table is ordered by increasing atomic ...
ATOMIC NUMBER | English meaning - Cambridge Dictionary
ATOMIC NUMBER definition: 1. the number of protons found in the nucleus of an atom of a particular chemical, used as a way of…. Learn more.
Atomic Number — Definition & Overview - Expii
Each atom has an atomic number, Z, which corresponds to the number of protons. Each element is distinguished from a different element by the number of protons in the atom. On the periodic table, the atomic number can be found in each element block with the element symbol. For example, hydrogen's (H) atomic number is 1 and carbon's (C) is 6.