assignment 2 ch 4
Terms
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- how many quantum numbers are used to describe the energy state of an electron in an atom
- 4
- a spherical electron cloud surroudning an atomic nucleus would best repersent
- an s orbital
- an energy level of n=4 can hold _______- electrons
- 32
- en energy level of n=2 can hold _____ electrons
- 8
- an electron for which n=4 has more ___ than an electron for which n=2
- energy
- the modern model of the atom that treates 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
- Heisenbery uncertainty principle
- a three dimensinal region around the nucleus representnig the probabiliyy of finding an electron
- atomic orbital
- originally applied ot the hydrogen atom, it led to the quantum mechanical model of the atom
- Schrodinger wave equation
- atomic orbitals ________ have an exactly defined size
- do not
- each orbital may contain at most _____ electrons
- two
- all s orbitals are _____
- spherically shaped
- a principal enenrgy has __ energy sublevels
- n
- the maximum number of _ related to each principal energy level equals 2n2
- electrons
- there are __ equal energy p orbital
- three
- hydroven's principal energy level 2 consists of __ orbitals
- 2s and 2p
- hydroven's principal energy level 3 consists of _____ orbitals
- nine
- the bending of a wave as it passes by t he edge of an object is called
- diffraction
- when waves overpal each other ____ occurs
- interferance
- the wave properties of electrons and other very small particles are described mathematically by
- quantum theory
- an orbtal, a three dimensiaonal region aroundt he nucleus indicates
- the probable location of an electron
- wave functions give only the probability of finding an electron at a given place around the nucleus
- true
- what are quantum numbers
- numbers that specify the properties of atomic orbitals and the properties of electrons in orbits
- principal quantum #
- n, main enrgy levels surrounding nucleus
- angular momentum number
- l, shape of an orbital
- magnetic quantum number
- m, orientation of an orbital about teh nucleus
- what does the spin number indicate
- +1/2, -1/2 the two possible states of an electron orbital