Among the following the odd pair is

Change in the number of neutrons in an atom changes it to

The number of protons, neutrons and electrons present respectively in \(_{ 35 }^{ 80 }{ Br }\)

Calcium and Argon are examples of a pair of __________

_________ isotope is used in the nuclear reactors.

The number of neutrons present in \(_{ 3 }^{ 7 }{ Li }\) is ------

The valency of Argon is ________

In an atom, electrons revolve around the nucleus in fixed orbits

Electrons have negligible mass and charge.

The maximum number of electron in L Shell is 10

Name an element which has the same number of electrons in its first and second shell

Compare the charge and mass of protons and electrons.

Ca²⁺ has completely filled outer shell. Justify your answer

Methane burns in oxygen to form carbon dioxide and water vapour as given by the equation
CH_4(g) + 2O_2(g) ➝ CO_2(g)+ 2H₂O_(g)
Calculate: (i) the volume of oxygen needed to burn completely 50 cm³ of methane and (ii) the volume of carbon dioxide formed in this case.

State the law of multiple proportions

Calculate the number of neutrons, protons and electrons (i) atomic number 3 and mass number 7 (ii) atomic number 92 and mass number 238.

Explain the postulates of Bohr’s atomic model.