When milk becomes sour, ___ is produced.
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The number of neutrons present in a nitrogen atom is ___.
Atomic numbers of four elements are as follows : F(9), P(15), Cl(17), Ar(18). Which of the following two elements would be chemically similar?
There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?
The pH of a solution, whose hydrogen ion concentration is 1 x 10 mole per litre, will be ____.
Galvanization a process to prevent rusting involves use of ___ coating to steel or iron.
Which of the following scientists gave the law that governs the force of attraction/repulsion between two charged particles?
The maximum number of electrons that can be accommodated in a shell is indicated by the formula