químicos
/KEE-mee-kohs/
chemicals

As a noun, químicos means "chemicals," or substances used in chemistry.
químicos(noun)
chemicals
?substances
chemists
?people who study chemistry (less common than 'químicas/os')
📝 In Action
Muchos productos de limpieza contienen químicos fuertes.
A2Many cleaning products contain strong chemicals.
Debemos guardar los químicos bajo llave, lejos de los niños.
B1We must store the chemicals locked up, away from children.
💡 Grammar Points
Gender and Plural
Since 'químicos' ends in -os, we know it is a masculine noun and is plural. This means it describes multiple masculine things or a mix of masculine and feminine things.
❌ Common Pitfalls
Using the wrong gender
Mistake: "La químicos son peligrosos."
Correction: Los químicos son peligrosos. (The article 'los' must match the masculine noun 'químicos'.)
⭐ Usage Tips
Singular Form
The singular form is 'químico' (one chemical). You usually see the plural form 'químicos' when talking about groups of ingredients.

Used as an adjective, químicos describes something "chemical" or relating to the science of chemistry.
📝 In Action
Necesitamos analizar los procesos químicos en la fábrica.
B1We need to analyze the chemical processes in the factory.
Los elementos químicos se combinan de muchas maneras.
B2The chemical elements combine in many ways.
💡 Grammar Points
Adjective Agreement
As an adjective, 'químicos' must match the noun it describes in number (plural) and gender (masculine). It is used for plural masculine nouns, like 'procesos' or 'productos'.
❌ Common Pitfalls
Mismatched agreement
Mistake: "Las reacciones químico fueron rápidas."
Correction: Las reacciones químicas fueron rápidas. (The adjective must be feminine plural 'químicas' to match 'reacciones'.)
⭐ Usage Tips
Placement
Like most Spanish adjectives, 'químicos' usually comes immediately after the noun it describes (e.g., 'productos químicos').
✏️ Quick Practice
💡 Quick Quiz: químicos
Question 1 of 2
Which sentence uses 'químicos' as a noun (a thing)?
📚 More Resources
Frequently Asked Questions
What is the difference between 'químicos' and 'sustancias'?
'Químicos' often implies substances that are manufactured or used in industry/science (like pesticides or cleaning agents). 'Sustancias' is a broader, more general term for any material or substance.
Can 'químicos' refer to people?
Yes, but less often. It can mean 'chemists' (people who work in chemistry). However, when referring to male chemists, the most common noun is often 'los químicos' (the chemists), matching the plural noun definition.