Chemistry Unit Test (Atomic Structure and Electron Configurations Multiple Choice)

region of the most probable electron location

in the quantum-mechanical model of the atom, an orbital is defined as a

does not account for the stability of most atoms since accelerating electrons would quickly lose energy and fall into the nucleus, causing the atom to collapse

rutherford's nuclear model of an atom

1

s orbitals can have how many different orientations in space ?

heisenberg uncertainty principal

states that the position and momentum of an electron in an atom cannot be found precisely because measuring the electron changes its momentum

angular (l)

the __________ quantum number defines the shape of an orbital

electrons fill lower energy levels first before occupying higher energy levels

the aufbau principle describes that;

3

the lowest energy shell that contains d orbitals is the shell with n=

hund's rule

the lowest orbital energy is reached when the number of electrons with the same spin is maximized. this statement describes;

0, 3

the n=1 shell contains __________ p orbitals. all the other shells contain __________ p orbitals

6

the p orbital can accommodate a maximum of __________ electrons

3

the principal quantum number of the first d orbital is __________

describes an electron probability distribution that determines the most likely location of an electron, is the current accepted atomic model, and makes predictions based on schrodinger's wave equation

the quantum-mechanical model of the atom;

2

there are __________ subshell in the second shell

9

there are __________ total orbitals in the 3rd shell

absorbs energy as it moves to a higher energy state

when an excited electron in an atom moves from the ground state, the electron;

no two elements have the same ground-state electron confirguration

which two elements have the same ground-state electron configuration ?

p

__________ orbitals are dumbbell shaped

s

__________ orbitals are spherically symmetrical

principal (n)

all of the orbitals in a given electron shell have the same value for the __________ quantum number

principal and angular

all of the orbitals in a given subshell have the same value of the __________ quantum number

2

all orbitals can hold a maximum of __________ electrons

14, 10, 6

at a maximum, an f-orbital can hold __________ electrons, a d-orbital can hold __________ electrons, and a p-orbital can hold __________ electrons

proposes that electrons occupy specific energy levels and explains the emission spectra of hydrogen atoms

bohr's atomic model;

5

d orbitals can have how many different orbitals in space ?

return to lower energy states within atoms

during a flame test, a lithium salt produces a characteristic red flame. this red color is produced when electrons in excited lithium atoms;

4

how many quantum numbers are necessary to designate a particular electron in an atom ?