The discovery of the atomic nucleus by bombarding a thin gold foil with alpha particles is associated with which of the following scientists?
Ernest Rutherford
Ernest Rutherford conducted the famous gold foil experiment in 1911, in which alpha particles were directed at a thin sheet of gold foil.
Most alpha particles passed straight through, but a small fraction were deflected at large angles, leading Rutherford to conclude that atoms have a small, dense, positively charged centre called the nucleus, with electrons orbiting around it in mostly empty space.
John Dalton proposed the atomic theory of indivisible atoms, Robert Boyle is known for Boyle's Law in gas behaviour, and Dmitri Mendeleev developed the periodic table, none of which relate to the nucleus discovery.
Hence, the discovery of the atomic nucleus using the gold foil experiment is associated with Ernest Rutherford.
Two isotopes of an element have 17 protons with 18 neutrons and 20 neutrons, respectively. Which of the following is the correct representation of these isotopes?
Identify the element having zero valency
The atomic number of an element is 8. How many electrons will it gain to form a compound with sodium?
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
What is the atomic number of nitrogen?
What are isobars?