Chalk is called सुधाखंडः (sudhaakhandaha) in Sanskrit.
When chalk (the mineral) dissolves in water, it's called "limewater".
Oxygen is called "ऑक्सीजन" (Oxygen) in Sanskrit.
There is no word for it in the Sanskrit. The English language, while not the most complicated, it does have the largest amount of words. There are some English words that have no translation in certain other languages.
atoms
Molecule means 'Paramaanu' in most of the Indian languages including Marathi and Sanskrit.
Chalk in Sanskrit can be called "चाक" (chaak).
Chalk is "चूर्णक" (Churnaka) and duster is "मुष्टिका" (Mushtika) in Sanskrit.
Duster is called "धूलपट" in Sanskrit.
It is just called "The Chalk".
Rice is called "Vrihi" in Sanskrit.
Millet is called "Kangu" in Sanskrit.
Marigold is called "Genda" in Sanskrit.
In Sanskrit, a hen is called "Mātṛ."
Plastic is called "प्लास्टिक" in Sanskrit.
Symposium is called "sabha" in Sanskrit.
Cherry is called "Padmaka" in Sanskrit, and litchi is called "Litchika" in Sanskrit.
We called "rakta" to blood in sanskrit.