Awe and Wonder
The smallest particle that retains the properties of an element
What is an atom?
The number of protons, neutrons, and electrons in an atom tells us what?
What element is a certain atom?
The physicist to connect the idea of elements to different types of atoms.
Who is John Dalton?
A pure substance formed when two or more different chemical elements are chemically bonded together in a fixed proportion
What is a compound?
the scattering of light by particles in a colloid or fine suspension, making the light beam visible
What is the Tyndall Effect?
The resultant structure when two or more atoms bond together
What is a molecule?
The discoverer of the electron, and creator of the "plum pudding" model of the atom.
Who is JJ Thompson?
The physicist who developed the model of the atom with electron orbits- it's technically incorrect but useful for teaching
Who is Niels Bohr?
A physical combination of two or more substances where each substance retains its individual chemical properties
What is a mixture?
a chemical bond formed through the electrostatic attraction between oppositely charged ions, created by the transfer of electrons from one atom to another
What is an ionic bond?
A component of atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
What is a proton?
Physicist who proposed a theory of the atom in which electrons do not move in neat orbits, but rather "clouds of probability"
Who is Erwin Schrödinger?
The ancient Greek philosopher to originally posit atoms
Who is Democritus?
a mixture with tiny particles evenly dispersed throughout a medium, but are larger than in solutions and smaller than in suspensions
What is a colloid?
A chemical bond where two atoms share electrons to form a stable pair
What is a covalent bond?
An electrically neutral subatomic particle
What is a neutron?
The physicist who revived atoms as a real theory after they were ignored for centuries
Who is John Dalton?
A homogeneous mixture where one or more substances (solutes) are uniformly distributed in another substance
What is a solution?
A heterogeneous mixture where solid particles are dispersed in a fluid (liquid or gas) but do not dissolve
What is a suspension?
An experiment supporting the existence of the atomic nucleus based off of particles rebounding from it
What is Rutherford's gold foil experiment?
A subatomic particle with a charge of negative electricity, found in all atoms
What is an electron?
The physicist who discovered that the positive charge of the atom is clustered in the centre of an atom in something he called the "nucleus"
Ernest Rutherford
A substance that dissolves a solute (the substance being dissolved) to form a homogeneous mixture called a solution
What is a solvent?
the process where a solute disperses into a solvent to form a homogeneous solution
What is dissolution?
The experiment supporting the existence of electrons, and dismantling the idea that the atom is solid and indivisible.
What is J.J. Thompson's cathode ray experiment?