atomic number 4

Thân thiện

A scientist points to the atomic number 4 on a large periodic table poster.

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.

Học thuật

Noun

1. a light strong brittle grey toxic bivalent metallic element

Từ đồng nghĩa

• beryllium
• Be
• glucinium