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chemistry 5
| Question | Answer |
|---|---|
| lowest allowable energy state of an atom | ground state |
| Bohr's model of the atom predicted the ______ of the lines in hydrogen atomic emission spectrum | frequencies |
| according to Bohr's atomic model, the smaller an electrons orbit, the _______ the atoms energy level | lower |
| according to Bohr's atomic model the larger an electrons orbit the ______ the atoms energy level | higher |
| Bohr proposed that when energy is added to hydrogen atom, its _______ moves to higher-energy orbit | electrons |
| According to Bohr's atomic model, the hydrogen atom emits a photon corresponding to the difference between the _______ associated with the two orbits it transitions between | energy level |
| Bohr's atomic model failed to explain the ________ of elements other than hydrogen | atomic emission spectrum |
| the modern model of the atom that treats electrons as waves | quantum mechanical model of the atom |
| states that it is impossible to know both the velocity and the position of a particle at the same time | Heisenberg uncertainty principle |
| a three dimensional region around the nucleus representing the probability of finding an electron | atomic orbital |
| originally applied to the hydrogen atom it led to the quantum mechanical model of the atom | Schrodinger wave equation |
| atomic orbital ______ have an exactly defined size | do not |
| each orbital may contain at most ______ electrons | two |
| all s orbitals are _______ shaped | spherical |
| a principle energy has _____ energy sublevels | n |
| the maximum number of __________ related to each principal energy level equals 2nsquared | electron |
| there are ________ equal energy p orbitals | 3 |
| hydrogen principle energy level 2 consists of ____________ orbitals | 2s & 2p |
| hydrogen principle energy level 3 consists of _______ orbitals | three |
| the arrangement of electrons in an atom is called the atoms __ | electron configuration |
| electrons in an atom tend to assume the arrangement that gives the atom the ___ possible energy | lowest |
| electrons in an atom tend to assume the arrangement that gives the atom the lowest possible energy, this arrangement of electrons is the most ______ arrangement | stable |
| electrons in an atom tend to assume the arrangement that gives the atom the lowest possible energy, this arrangement of electrons is the most stable arrangement and is called the atoms | ground state electron configuration |
| states that each electron occupies the lowest energy orbital available | aufbau principle |
| states that a maximum of two electrons may occupy a single atomic orbital but only if they have opposite spins | pauli's exclusion principle |
| states that single electrons with the same spin must occupy each equal- energy orbital before additional electrons with opposite spins occupy the same orbital | hunds rule |
| the electrons in an atoms outermost orbitals | valence electrons |
| in an electron dot structure the elements symbol represents | atom's nucleus and inner level electrons |
| the table below was developed by John Newlands and is based on a relationship called the law of _______ | octaves |
| according to this law, the properties of the elements repeated every _____ elements | eight |
| thus for example element two and element ___ have similar properties | nine |
| the law of octaves did not work for all the known elements and was not generally | accepted |
| the first periodic table is mostly credited to | dmitri mendeleev |
| elements were arranged according to increasing | atomic mass |
| one important result of this table was that the existence and properties of undiscovered | elements |
| the element in the modern periodic table are arranged according to increasing | atomic number |
| the element in the modern periodic table are arranged according to increasing atomic number as a result of the work of | Henry Mosley |
| the element in the modern periodic table are arranged according to increasing atomic number as a result of the work of Henry Mosley. this arrangement is based on number of | protons` |
| the modern form of the periodic table results | periodic law |
| which states that when elements are arranged according to increasing atomic number, there is a periodic repetition of their chemical and physical | properties |
| a column on the periodic table | group |
| a row on the periodic table | period |
| group A elements | representative elements |
| elements that are shiny and conduct electricity | metals |
| group b elements | transition elements |
| there are ____ main classifications of elements | three |
| more than three-fourths of the elements in the periodic table | metals |
| group 1A metals (except for hydrogen) are known as | alkali medals |
| alkaline earth metals | Group 2A elements |
| group 7A elements are highly reactive nonmetals | halogens |
| group 8A elements are very unreactive elements known as | noble gases |
| mettaloids have properties of both metals and _____ | nonmetals |
Created by:
mattdanielle