Chapter 4 Flashcards
Who developed a mathematical atomic model?
Niels Bohr ?
What is the Heisenberg uncertainty principle?
We can’t know the location and momentum of an electron at the same time ????
What are quantum numbers?
Solutions to the various wave equations scientists use to describe the energy, momentum, and probable location of an electron ?
Can two electrons have the same quantum number?
No. They have their own addresses ??
Who was the first to develop an atom model based on experimental evidence?
John Dalton?
Who named the negatively charged cathode ray particles electrons?
George Johnstone Stoney?
Who was a professor at Cambridge who reasoned that there was a small region in an atom called the nucleus?
Ernest Rutherford?
Who was an assistant of Rutherford that designed an experiment that used a thin sheet of gold foil and a beam of alpha particles?
Hans Geiger ❄️⛄️
Who suggested that electrons were only in certain energy levels, which he called principles energy levels, outside the nucleus.
Niels Bohr ?
What is an atom’s atomic number?
The number of protons in the nucleus ?
