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Test 4 chemistry

Chemistry is awesome!

model developed from indirect evidence? The Atomic model
Recently the scanning/tunneling microscope has seen the atom. true.
A greek philospher that stated that mmatter contained particles that could be subdivided infinetly? Democritus
Greek word for atom? Atomos
Smallest particle still capable of chemical reactions? Atom
Every compound is formed of elements combined in specific ratios by mass that are unique for that compound? Law of definite composition
the man who discovered that elements have different masses and the law of definite composition was?? John Dalton
Discovered the electron? and was the maker of the plum-pudding model? JJ thompson
Discovered protons and concluded that atoms consist mostly of empty space and a central nucleus.? Ernest Rutherford
Conducted experiment using alpha particles.? Hans Geiger
Protons have what type of charge? Positive
Number of protons in an element Atomic Number (Z)
Number of protons affects both the?? Chemical and physical properties of an atom.
First man to observe neutrons? James Chadwick
when elements move to lower energy levels they emit light called? Spectroscopy
Man who proposed the idea principle energy levels of electrons and created the planetory model of the atom? Neihls Bohr
energy levels are quantitized meaning electrons can only have energies in specific? Quantities
Light consist in massless particles called ?? photons
Photons were discovered by? Albert Enstein
If waves can behave like particles than particles can behave like waves was stated by whom? Louise de' Broglie
It is impossible to know the energy(motion and position of an electron at the same time? The Heisenburg uncertainly principle.
The current atomic model is known as? The quantum model.
describe the quantum model?? a tiny nucleus surrounded by a cloud of electrons occupying orbitals.
3 dimensional regions of probable position? orbitals
what describes the location of electrons? Quantum numbers
the principle quantum number does what? identifies the main energy level and the probable distance fro the nucleus
all orbitals receive one electron with the same spin before they begin to pair up is the rule called? Hund's Rule
Symbol for Nuetrons? (N)
Number that identifies the spin of an electron? The electron-spin number
Number that identifies the sub-level of an electron.? Azimuthal Quantum number.
The four sub-level names are?? s,p,d,f
Number that identifies the specific orbital of an electron? magnetic quantum number.
the electron configuration for an atom is obtained by adding electrons to an atom with a lower atomic number is the principle called?? The Aufba principle
atoms with the same number of protons but different number of neutrons are called? Isotopes
the sum of an atoms protons and neutrons? Mass number.
The atomic mass unit?? (AMU) or (u)
The average mass of an element calculated by weighted average of an elements isotopes?? Atomic mass
electrons in the out most principle energy levels are called?? Valence electrons
an atom with a positive or negative charge is called? An Ion
Ion with a positive charged is called? Cation
ion with a negative charge? anion
Adding or subtracting protons equals?? New element
adding or subtracting neutrons equals?? different isotopes
adding or subtraction electrons equals? different ions
Principle that states that no two electrons in the same atom can have identical values for all four of their quantum numbers? Pauli exclusion principle
Created by: Kyle Witt



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