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CP 3 Vocab
chapter 3 vocab
Question | Answer |
---|---|
atom | small dense postive core (nucleus) surrounded by a large space of electrons |
plum pudding model | a model where an atom is composed of electrons surrounded by a soup of positive charge to balance out the negative |
gold foil experiment | experiment investigated the structure of an atom |
orbitals | mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom |
nucleus | contains protons and nuetrons |
Protons | 1/1H or 1/1P, mass= 1amu, positive charge, in nucleus |
electron | 0/-1e, negative charge, outside nucleus |
neutron | 1/0n, mass= 1amu, no charge, in nucleus |
mass number | sum of protons and neutrons |
atomic number | number of protons in an atom |
ion | non neutral, have gained or lost electrons |
isotope | different types of atoms of the same element |
atomic mass | The mass of an atom, listed in periodic table |
valence electrons | The electrons in the outermost shell |
octet | A set of eight valence electrons in an atom or ion, forming a stable configuration. |
excited state | A stationary state of higher energy than the lowest stationary state |
ionization energy | The energy needed to remove one or more electrons from a neutral atom to form a positively charged ion |
electron affinity | positive when the resulting ion has a lower energy |
electronegativity | a chemical property that describes the ability of an atom to attract electrons |
alchemy | a medieval endeavor concerned with turning other metals to gold |
cathode ray tube | a device that emits a beam of electrons |
nucleon | any subatomic particle found in the atomic nucleus |
Law of conservation of mass | states that there is no dectable change in the amount of mass present before and after a chemical reaction |
Law of Definte proportions | states that the elements combine in specific mass ratos to form compounds |