Vaša košarica je prazna
Ukupno: 2633
/
2633
Nitrogen comprises 78% of the air and is indispensable for living organisms.
U ovoj lekciji učimo o svojstvima sumporovodika.
Toksični spojevi koji uzrokuju kisele kiše, ali se također koriste kao industrijske sirovine.
Oksokiselina proizvedena u najvećoj količini koja, ovisno o koncentraciji, može imati korozivni ili pasivizirajući učinak.
Some processes cool the environment, while others heat it.
U ovoj lekciji možete saznati po čemu se razlikuju magarac i konj.
An element capable of self-ignition that plays an important role in the stiffness of our bones and in biological inheritance.
The age of Earth was debated for centuries by numerous outstanding scientists from different fields.
For thousands of years, scientists have wondered if the events around us are determined by causality, randomness or supernatural powers.
With this lesson, you can get to know yourself and your classmates better.
U ovoj lekciji učimo o krtici, korisnom grabežljivom sisavcu koji se često smatra štetnikom.
Silicon is the second most abundant element on Earth. Its compounds are found in various minerals.
While most metals are grey, they are not at all unremarkable.
Corrosion is the greatest enemy of metals.
Scientists have debated the nature of heat for centuries. Learn about this fascinating scientific debate.
This project demonstrates the reactions of several metals with acids.
In this lesson, we are going to revise and learn vocabulary related to holidays and travelling.