Atomic Structur...

Which of the following correctly represents the electronic distribution in the Mg atom?

If gas in a discharge tube is changed, what will happen to the mass of cathode ray particles?

What is the charge on oxygen?

Which sign will you use to complete the following relation?

Atomic number of an atom _______ Mass number of an atom

What will be the mass number of an atom if the number of electrons, protons and neutrons is 8, 8 and 9, respectively?

The mass of __________ is 9.107 10^–31 kg.

Cathode rays possess kinetic energy due to their _________.

Find the atomic number and mass number of an element for which the numbers of protons, neutrons and electrons are 10, 12 and 10, respectively.

Anode rays are so called because:
(i)         they are produced at anode
(ii)        they get deflected towards anode
(iii)       they are positively charged

An atom is electrically neutral because the number of electrons present in it is

The ion of an element has 3 positive charges. The mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Charge to mass ratio of cathode ray particles is ________.

Mass number of an element is ________.

Which of the following scientists discovered electron?

If an atom has 10 protons and 11 neutrons, what will be its atomic number?

Which of the following particles is/are not a part of the atomic nucleus?

Which gas has the highest e/m value with respect to its anode rays?

Which of the following sub-atomic particles has/have 1 u relative mass and + 1 relative charge?

(i) Proton
(ii) Electron
(iii) Neutron

If the atomic mass and atomic number of hydrogen are both equal to 1, then how many protons, electrons and neutrons are present in it?

Which of the following statements is correct about a neutron?