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1.
What is the number of water molecules present in a tiny drop of water (volume 0.0018 ml) at room temperature?
2.
The number of neutrons in 7AI27 is
3.
The nucleus of a singly ionized carbon atom contains
4.
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
5.
What is the number of mole(s) of H2(g) required to saturate one mole benzene?
6.
How many moles of hydrogen atom are present in one mole of Aluminium hydroxide?
7.
Protons and neutrons are bound in a nucleus by the
8.
Which one among the following most correctly determines the atomic number of an element
9.
The number of protons in a negatively charged atom (anion) is
10.
Which of the following pairs is/are correctly matched?
1. Isotopes: Atoms with same atomic number but different atomic mass
2. Isobars: Atoms with same number of neutrons but different atomic number
3. Isotones: Atoms with same mass number but different atomic number.
Select the correct answer using the code given below:
1. Isotopes: Atoms with same atomic number but different atomic mass
2. Isobars: Atoms with same number of neutrons but different atomic number
3. Isotones: Atoms with same mass number but different atomic number.
Select the correct answer using the code given below: