Podcast
Questions and Answers
Who was the English scientist who came up with the atomic theory in 1803?
Who was the English scientist who came up with the atomic theory in 1803?
What is the meaning of the Greek word atomas from which 'atom' is derived?
What is the meaning of the Greek word atomas from which 'atom' is derived?
What did Dalton call the simplest units of compounds in his atomic theory?
What did Dalton call the simplest units of compounds in his atomic theory?
According to Dalton's atomic theory, what happens to atoms themselves when they combine in chemical reactions?
According to Dalton's atomic theory, what happens to atoms themselves when they combine in chemical reactions?
Signup and view all the answers
What did Dalton explain in his theory regarding the structure of compounds?
What did Dalton explain in his theory regarding the structure of compounds?
Signup and view all the answers
What was one of Dalton's major contributions to science?
What was one of Dalton's major contributions to science?
Signup and view all the answers
What did Michael Faraday's experiments in 1834 reveal about matter?
What did Michael Faraday's experiments in 1834 reveal about matter?
Signup and view all the answers
What prompted scientist Stoney to assume the existence of particles called electrons?
What prompted scientist Stoney to assume the existence of particles called electrons?
Signup and view all the answers
How was the electron discovered by scientist Thomson in 1897?
How was the electron discovered by scientist Thomson in 1897?
Signup and view all the answers
What did Thomson calculate from the magnitude of the electric field and the magnetic field?
What did Thomson calculate from the magnitude of the electric field and the magnetic field?
Signup and view all the answers
What happened when a magnetic field passed perpendicular to the electric field?
What happened when a magnetic field passed perpendicular to the electric field?
Signup and view all the answers
What effect did stopping the passage of electric current have on the electron beam?
What effect did stopping the passage of electric current have on the electron beam?
Signup and view all the answers
What did Thomson find when he applied an electric current through two plates until the electron beam returned to its original straight path?
What did Thomson find when he applied an electric current through two plates until the electron beam returned to its original straight path?
Signup and view all the answers
What did experiments at the end of the nineteenth century focus on?
What did experiments at the end of the nineteenth century focus on?
Signup and view all the answers
What does Michael Faraday's 1834 experiment show about chemical changes?
What does Michael Faraday's 1834 experiment show about chemical changes?
Signup and view all the answers
What did Michael Faraday's experiments show about atoms and molecules?
What did Michael Faraday's experiments show about atoms and molecules?
Signup and view all the answers
The atomic number of cobalt supported the existence of a new relationship between the arrangement of elements based on their atomic numbers and their properties.
The atomic number of cobalt supported the existence of a new relationship between the arrangement of elements based on their atomic numbers and their properties.
Signup and view all the answers
Goldstein observed a positive ray inside a cathode ray tube and proved that it was a positive particle with a charge equal to the charge of the electron.
Goldstein observed a positive ray inside a cathode ray tube and proved that it was a positive particle with a charge equal to the charge of the electron.
Signup and view all the answers
Chadwick confirmed the existence of neutrons by observing the emission of high-energy particles that carried a charge.
Chadwick confirmed the existence of neutrons by observing the emission of high-energy particles that carried a charge.
Signup and view all the answers
The number of neutrons in an atom can be calculated by subtracting the mass number from the atomic number.
The number of neutrons in an atom can be calculated by subtracting the mass number from the atomic number.
Signup and view all the answers
All atoms of an element have the same number of protons and neutrons.
All atoms of an element have the same number of protons and neutrons.
Signup and view all the answers
Moseley discovered X-rays in 1895.
Moseley discovered X-rays in 1895.
Signup and view all the answers
Moseley noticed that the collision of cathode rays in the X-ray tube of different elements gave the same energies.
Moseley noticed that the collision of cathode rays in the X-ray tube of different elements gave the same energies.
Signup and view all the answers
Moseley concluded that the number of positive charges in the nucleus decreases from one atom to another by individual electronic units.
Moseley concluded that the number of positive charges in the nucleus decreases from one atom to another by individual electronic units.
Signup and view all the answers
The atomic number of nickel is lower than the atomic number of cobalt.
The atomic number of nickel is lower than the atomic number of cobalt.
Signup and view all the answers
Moseley calculated the nucleus charge for the calcium atom to be +22.
Moseley calculated the nucleus charge for the calcium atom to be +22.
Signup and view all the answers
