The video explores the evolution of atomic theory, starting with Leucippus and Democritus's early ideas, through the discoveries of Lavoisier, Dalton, Thompson, Rutherford, Bohr, and Heisenberg. It highlights key developments such as the discovery of electrons, the nucleus, and the formulation of quantum theory, emphasizing the collaborative nature of scientific progress and the ongoing quest for understanding.

Who were the first to propose the idea that matter is composed of indivisible particles?

• Einstein and Bohr

• Rutherford and Thompson

• Leucippus and Democritus

• Newton and Galileo

What did J.J. Thompson discover?

• The nucleus

• Neutrons

• Electrons

• Protons

Thompson's atomic model is still known as the

• Plum Pudding Model

• Bohr model

• Dot diagram model

• Uncertainty Priniciple

What were the 2 major findings of Rutherford's gold foil experiment?

• Discovery of electrons

• Atoms are mostly empty space

• Electrons orbit the nucleus in fixed paths

• Atoms can be divided infinitely

• Positively charged area of an atom must be concentrated in an area called the nucleus

Tags

NGSS.HS-PS1-8

Bohr's atomic model is also known as the "planetary model" because it represents the electrons in ______ around a small central nucleus

What did Bohr's model of the atom suggest?

• Electrons exist in probability clouds

• Electrons orbit the nucleus in fixed paths

• Electrons move in random patterns

• The nucleus is made of protons and neutrons

What principle is central to Heisenberg's quantum theory?

• Electrons move in fixed orbits

• It's impossible to know both the position and momentum of an electron with certainty

• The nucleus contains only protons

• Atoms are indivisible

The quantum model of atoms is often called the __ model of the atom.

• orbital

• plum pudding

• cloud

What is one new fact you learned about atoms from this video?

Tags

NGSS.HS-PS1-8