Chemistry Scientists

Arranged elements according to their atomic masses

• Bohr

• Moseley

• Mendeleev

• Dalton

Planetary model of the atom- electrons orbit in 2-dimensional planetary orbits around the nucleus

• Democritus

• Moseley

• Thompson

• Bohr

Arranged elements according tto their atomic numbers

• Moseley

• Rutherford

• Thompson

• Bohr

1) elements are composed of atoms. 2) atoms of same element are identical, but differ from other elements. 3) elements can mix together 4) atoms only change when mixed with other elements

• Dalton's Atomic Theory

• Aufbau Principle

• Heisenberg Uncertainty Principle

• Rutherford

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Gold foil experiment bombarded with alpha particles: (atom is mostly empty space, atoms contains a dense, positively charged nucleus)

• Bohr

• Rutherford

• Democritus

• Moseley

Philosopher that said all matter is made of tiny particles called "atomos" or atoms

• Democritus

• Bohr

• Dalton

• Mendeleev

Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and all electrons in singly occupied orbitals must have the same spin

• Heisenberg Uncertainty Principle

• Dalton's Atomic Theory

• Bohr Model

• Hund's Rule

It is impossible to know exactly both the velocity and the position of a particle at the same time

• Pauli Exclusion Principle

• Hund's Rule

• Heisenberg Uncertainty Principle

• Aufbau Principle

States that each electron occupies the lowest energy orbital available

• Aufbau Principle

• Heisenberg Uncertainty Principle

• Hund's Rule

• Pauli Exclusion Principle

Discovered the electron, plum pudding model

• Bohr

• Rutherford

• Democritus

• Thompson