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Transcript of ERNEST RUTHERFORD
Earnest Rutherford discovered that the nucleus was positively charged.
Atoms were mostly made up of empty space.
Shot alpha particles at a foil gold sheet.
He observed that most of the particles went through and only 1 in 8000 deflected.
ATOMIC MODEL CONTINUED
Fourth child out of 12 children.
Motivated and inspired by his mother, Martha.
His family had trouble with financial problems and managed to overcome many challenges.
Motto: “We haven’t the money, so we've got to think.”
His first Science book inspired him to perform his first scientific experiment which was a miniature cannon.
Received 2 scholarships while he attended private schools.
Earnest Rutherford was:
Born on the 30th of August 1871.
Laid to rest on the 9th of October 1937.
A Chemist and Physicist.
Famous for winning the Nobel Prize in Chemistry.
Famous for his theory on atomic structure.
Given a nickname known as the "Father of the Nuclear Age" for proving the plum pudding model, by Joseph John Thomson, incorrect.
Professor J.J Thomson collaborated with Rutherford.
Rutherford soon grew an interest to radioactivity.
Discovered the two different types of radiation - alpha and beta particles.
Alpha particles are positively charged and can be stopped by a sheet of paper.
Beta particles are negatively charged and can be stopped by a 1 mm sheet of aluminum foil.
Earnest Rutherford also uncovered half-life.
Radioactive isotopes were beginning to disappear.
Radioactive isotopes were decaying in a pattern.
Let say, you can have 50 coins. You drop all of them on the ground and the ones that landed on tails = decayed isotope.
The ideal scenario - half heads, half tails.
By chance, it might not be half each.
WHO WAS ERNEST RUTHERFORD?
Book : Great Scientists
The Rutherford atomic model was first proposed in 1911
It describes a tiny, dense positively charge core.
The core is comprised protons (positive) and neutrons (neutral).
Most of the atom's mass is found in the nucleus.
There are negatively charged particles (electrons) orbiting the atom in electron shells.