atomic number 4
Definition
Noun: A light, strong, brittle, grey, toxic, bivalent metallic element. It is the chemical element with the atomic number 4.
Usage and Examples
- Atomic number 4 is the scientific identifier for the element beryllium.
- The periodic table lists beryllium as atomic number 4.
- All atoms with atomic number 4 have four protons in their nucleus.
Advanced Usage
- The term is primarily used in scientific, technical, and educational contexts to specify an element by its fundamental property (the number of protons) rather than its common name.
- It can be used to discuss elemental properties or trends in the periodic table.
- Elements preceding atomic number 4 are hydrogen, helium, and lithium.
Variants and Related Words
- Beryllium (Be): The common name for the element with atomic number 4.
- Atomic number: The number of protons in the nucleus of an atom, which defines the chemical element.
Synonyms
- Beryllium
- Be (chemical symbol)
Notes on Meaning
This term has a single, precise scientific meaning. It is not used in idiomatic expressions or phrasal verbs. Its definition is fixed by international scientific convention.
Noun
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a light strong brittle grey toxic bivalent metallic element
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