atomic number 27

5.7

A hard silver-white metal used in magnets and alloys

noun
/əˈtɑːmɪk ˈnʌmbər ˈtwɛntiˈsɛvən/

Specialized

: número atómico 27

Cobalt has an atomic number 27.

Examples

In the periodic table, atomic number 27 designates the element cobalt, which is known for its hardness.
Industrial magnets often contain atomic number 27 due to its magnetic properties.
Atomic number 27 is essential for the production of vitamin B12 in the human body.
Certain soils are deficient in atomic number 27, which can affect plant growth.
Did you know that atomic number 27 refers to cobalt?
Atomic number 27 is crucial in the production of various alloys used in high-strength materials.
Many dietary supplements include atomic number 27 to support nutritional needs related to cobalt.

Synonyms

cobalt

vsatomic number 27

Specialized

19 5.5

A hard, silver-white metal used to make strong alloys and a small nutrient for living things

identifies that element by its periodic table number

vsatomic number 27

Specialized

5 7.1

A hard silver-white metal that is magnetic and used in strong metal mixtures, batteries, and some vitamins

identifies the element by its periodic table number

Surface Forms

atomic number 27 singular

atomic numbers 27 plural

Morphology

atomic + number + twenty-seven

The phrase is fully compositional: 'atomic' (pertaining to atoms) + 'number 27' indicates the atomic/proton number 27, i.e. the chemical element with that number. This construction is a standard scientific label (found cross‑linguistically), so a learner who knows the constituent words can infer it refers to the element with atomic number 27 (though they might not recall the element name 'cobalt' without periodic‑table knowledge).

Etymology

Atomic number 27 comes from how elements are given a number based on their atoms: atomic shows it is about atoms and number 27 tells how many tiny particles called protons are inside. The metal cobalt has 27 protons, so 'atomic number 27' is simply a name for 'cobalt'.