Chemistry Chapter 4
The noble gas notation for the electron configuration of bromine is. How many unpaured electrons>
1
How many electrons can d sublevel contain?
10
What is the total number of orbitals in the 4th main energy level?
16
In the ground-state hydrogen atom in which orbital is the electron?
1s
What is the correct notation for a sub-level withing the first energy level
1s
Oxygen has an electron configuration 1s22s22p4. In this arrangement, how many inner-shell elctrons does O have>
2
What is the maximum number of electrons that a single orbital can hold?
2
How many electons are present in antom of calcium?
20
The ground-sate electron configuration of neon is 1s22s22p6. In this arrangemnet, how many of neon's p orbitals are completely filled?
3
According to the Aufbau principle, which of the following sublevels is lowest in energy?
4s
How many different orientations are there for d orbitals?
5
A ground state atom of which leement has one ecltron in its 4th and outermost main energy level?
K
The statement that no two electrons in the same atom can have the same 4 quantum number is the restatement of _____.
Paul's exclusion principle
quantum number
a number that specifies the properties of electrons in an atom
orbital
a region in an atom where there is a high probability of finding electrons
excited state
a state in which an atom has more energy than it does at ground state
electromagnetic spectrum
all of the frequencies or wavelengths of electromagnetic radiation
As the frequency of wave increases, the wavelength _____.
decreases
According to the Bohr model of the atom, which particles are allowed to exist in any one of the energy levels?
electrons
The process of an atom releasing energy when it moves to a lower energy state is called _____.
emission
In the Bohr model of the atom, in which orbit is an electron in its lowest energy state?
in the orbit closest to the nucleaus
The line-emission spectrum of an atom is caused by the energies released when electrons _____.
jump from a high energy level to a lower energy lever
ground state
lowest energy state of a quantized system
A form of energy that exhibits wave behaviors through space is _____.
microwaves, ultraviolet. infrard
Separating unpaired electrons into as many orbitals as possible
minimizes the repulsion between electrons (Hund)
A quantum of energy is the _____.
minimum quantity of energy that can be lost or gained by an atom
Which of the following is a noble gas>
neon
Bohr's model correctly explain the spectra of atoms with how many electrons?
one
Which is not a quantum number>
orbital quantum number
Which orbitals can be modeled as dumbbell shaped?
p
To define the region in which electrons can be found, scientists have assigned four _____ numbers to each electron.
quantum
Which mathematically describes the wave properties of electrons?
quantum theory
Which is a wave property that electrons possess?
radiation
Which color of light is visible spectrum the longest?
red
Because excited hydrogen atoms always produced the same line-emission spectrum, scientists concluded that hydrogen _____.
releases energy of only certain values
Quantum numbers are sets of numbers that _____.
specify properties of electrons
In the equation c=yv, c represents _____.
speed of light
Hund's rule
states that for an tom in the ground state, the number of unpaired electrons is maximum possible and these unpaired electrons have the same spin
aufbau principle
states that the stricture of each successive element is obtained by adding one proton to the nucleus of the atom and one electron to the lowest energy orbital that is available
Pauli exclusion principle
states that two particles of a certain class cannot be in the exact same energy state
electron configuration
the arrangement of electrons in an atom
quantum theory
the present-day model of the atom, in which electrons are located in orbitals
line-emission spectrum
the spectrum of a few colors seen through a prism made when high-voltage current is passed through a tube of hydrogen gas at a low pressure
All electromagnetic radiation, including visible light, can be thought of a as moving _____.
waves.
photoelectric effect
what occurs when light strikes a metal and electrons are released
