History
This model was developed by J.J. Thomson which depicts that atoms are uniform spheres of positively charged matter in which electrons are embedded.
What is the Plum pudding model?
It is arranged according to atomic number.
What is the modern Periodic Table?
It is the force that holds the nucleus together.
What are nuclear forces?
It is a system of worldwide measurements and is commonly abbreviated as SI.
What is the International System of Units?
Made up of two or more atoms chemically combined together.
What is a molecule?
Said that everything in the universe is made up of tiny particles called atoms.
Who is Democritus?
It is the same throughout a period of elements.
What is the number of orbits or shells?
The intermolecular force is responsible for the attraction between an ion and a polar molecule.
What is ion-dipole interaction?
It is the SI unit of temperature.
What is Kelvin?
Atomic particles found inside the nucleus of an atom.
What are protons and neutrons?
A Swedish chemist helped to develop the notation for writing chemical formulas
Who is Jons Jacob Berzelius?
These elements contain atoms that can have multiple oxidation states.
What are Transition metals?
The energy needed to remove an electron.
What is ionization energy?
What is atomic mass unit (amu)?
The mass number of an ion that contains 53 protons, 74 neutrons, and 54 electrons.
What is 127?
Empedocles was the first to say that these 4 metaphysical elements were the "essence" of all material substances.
What are water, fire, earth, and air?
A family from the periodic table that consists primarily of large, radioactive, man-made elements.
What are Actinides?
This process must exist in equilibrium with the evaporation process when a measurement of vapor pressure is made.
What is condensation?
It is the SI unit for radioactive decay.
What is Becquerel (Bq)?
It refers to the number of atoms present in a molecule of a substance.
What is atomicity?
Paracelsus gave a further philosophical suggestion where the Aristotelian elements combined to give his "tria prima" or "three principles".
What are salt, sulfur, and mercury?
An early attempt to classify elements by their relative mass and common properties, proposed by Johann Doebereiner.
What is the Law of Triads?
This behavior is displayed by a nonpolar liquid when the cohesive forces are stronger than the adhesive forces toward glass container.
What is a convex meniscus?
A unit of length used to measure extremely small distances and is equal to 10-10 meters or 10-8 centimeters.
What is an angstrom?
Stated that atoms are indivisible, meaning they cannot be broken down into smaller particles.
What is Dalton's Atomic Theory?