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.
Molecule means 'Paramaanu' in most of the Indian languages including Marathi and Sanskrit.
atoms
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.
Plastic is called "प्लास्टिक" in Sanskrit.
Symposium is called "sabha" in Sanskrit.
In Sanskrit, a hen is called "Mātṛ."
Rice is called "Vrihi" in Sanskrit.
Millet is called "Kangu" in Sanskrit.
Marigold is called "Genda" in Sanskrit.
It is just called "The Chalk".
Cherry is called "Padmaka" in Sanskrit, and litchi is called "Litchika" in Sanskrit.
We called "rakta" to blood in sanskrit.