Question

Give the name of all scientists who contributed in the discovery of atomic nucleus....​

Answer 1

discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. After the discovery of the neutron in 1932, models for a nucleus composed of protons and neutrons were quickly developed by Dmitri Ivanenko[1]and Werner Heisenberg.[2][3][4][5][6] An atom is composed of a positively-charged nucleus, with a cloud of negatively-charged electronssurrounding it, bound together by electrostatic force. Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud. Protons and neutrons are bound together to form a nucleus by the nuclear force. hope it helps
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Answer 2

ATOMIC THEORY

BY: JIHAN KHALAF

2.

HISTORICAL DEVELOPMENT

The philosophy of atomism developed in many ancient traditions. Greek philosophers purposed the existence of atoms.

3.

JOHN DALTON

scientists background: He was born on september 6, 1766 in England. John was a chemist, Meteorologist, and a Physicist. 1800, he was secretary of the Literary and Philosophical society.He developed the Dalton’s Law in 1801. Law: total pressure = sum of partial pressures of gases.

4.

DESCRIPTION OF EXPERIMENTAL DESIGN

Dalton printed his first published table on atomic weights. In his laboratory notebook, he made a list setting out the atomic weights of elements.problem of calculation was made that: the proportionate diameter of the atoms in which he was persuaded that all gases were made.Dalton used chemical analysis, which is the quantity, separation, and identification of chemical parts or elements.Procedures: John Dalton did not use any procedures, instead he used calculations, laws, physics, and mathematics to come up with his theory.

DATA COLLECTED

1. Energetic mountain excursions (movement of a body or a point from a mean position to a neutral value) 2. Investigated if water vapor existed separately in the atmosphere.Analysis/conclusions: He concluded that water vapor exists in air as the only gas.

6.

JJ THOMPSON

Background: he was a British physicist who was born on December 18, 1856 in Manchester, England. He found the first evidence of isotopes. Contribution: 1. Thompson discovered the natural radioactivity of potassium (K) in 1905. 2. 1906: determined that hydrogen had only one electron per atom.

7.

EXPERIMENTAL DESIGN

he was the first one who investigated the magnetic bend of cathode rays. A Cathode Ray is a flow of electrons from a cathode(electrode) in a vacuum tube and into a narrow beam. Procedures: In his experiment Thompson used tools such as: Crookes tube, electrometer, and a magnet.He did experiments to show how cathodes were charged and bent electrically.

IRENE CURIE

n finally

Robert milkan