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AMU
Nucleus
Nuclear Reaction
People
Misc
100
Atomic mass
What are Protons and Neutrons combined?
100
Protons and Neutrons make this up
What is Nucleus?
100
Nuclear Fission, losing 2 protons and 2 neutrons
What is Alpha Decay?
100
He claimed that elements combine in whole-number ratios to form compounds and that matter is not created or destroyed in chemical reactions. He reasoned that elements are made out of tiny, indivisible spherical particles called atoms. His experiments lead to the Solid Sphere Model
Who is DALTON?
100
In 1932, he found the nucleus also had uncharged particles which he called neutrons. He said they were important in holding the positively charged protons together. He also found that you could use these neutrally charged particles in a process known as fission to break up the nucleus of an atom.
Who is James Chadwick?
200
This stated that atomic masses of all elements would prove via a whole number rule to be exact multiples of this hydrogen weight.
What is Prout's hypothesis?
200
What is the smallest part of nucleus?
Quark
200
Electron is lost; Neutron becomes Proton
What is Beta Decay?
200
In 1897, He zapped atoms with electricity and negatively charged particles were removed. He claimed the that atom contains negatively charged particles which he called electrons. This lead to the Plum Pudding Model.
Who is JJ Thompson?
200
Why does Deuterons have less mass than a Proton with a Neutron
What is binding energy?
300
He soon proved that this hypothesis did not always hold even approximately, and in some elements, such as chlorine, atomic weight falls almost exactly between two multiples of the hydrogen weight(isotopes)
Who is Berzelius?
300
In 1911, Rutherford shot alpha particles at thin gold foil and noticed some of them bounced back. He claimed there is something positive in the atom, which is called?
Nucleus
300
A nucleus changes from a higher energy state to a lower energy state through the emission of electromagnetic radiation
What is Gamma Decay?
300
In 1911, He shot alpha particles [ at thin gold foil and noticed some of them bounced back. He claimed there is something positive in the atom, which he called a nucleus. In 1918, he used alpha particles to knock off small positively charged particles which he called protons. He claimed the nucleus was a collection of protons.
Who is Rutherford?
300
Something with same protons but different neutrons
What is Isotope?
400
By applying Avogadro's law, he formulated a law to determine atomic weights of elements: the different quantities of the same element contained in different molecules are all whole multiples of the atomic weight and determined atomic weights and molecular weights by comparing the vapor density of a collection of gases with molecules containing one or more of the chemical element in question.
What is Stanislao Cannizzaro?
400
This is a model of the atomic nucleus which uses the Pauli exclusion principle to describe the structure of the nucleus in terms of energy levels
What is Shell Model?
400
When kinetic energy is released in a Nuclear reaction.
What is exothermic reaction?
400
In 1913, he tried to explain the light given off when elements are exposed to flames are electric fields that is like the solar system.
Who is Niels Bohr?
400
the process by which an atomic nucleus of an unstable atom loses energy by emitting ionizing particles (ionizing radiation). The emission is spontaneous
What is radioactive decay?
500
When did chemists and physicists start using the same scale for AMU?
What is 1960's?
500
this model in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with electrostatic forces providing attraction, rather than gravity.
What is Bohr Model?
500
When kinetic energy is supplied for the reaction to take place.
What is endothermic reaction?
500
In 1927, he said the location of an electron can't be specified. There is an area of where the electron could be, which is somewhere in the electron cloud
Who is Werner Heisenberg?
500
How many days does it take for Mr. Balicki to grow his facial hair.
What is the world may never know?