Atomic Structure

Question 0

Materials having no unpaired electrons, being slightly repelled by a magnetic field

Answer 0

Diamagnetic materials

Question 1

Materials that have unpaired electrons causing a magnetic field to align the spins of the electrons and to weakly attract the atom to the field.

Answer 1

Paramagnetic materials

Question 2

What are the valence electrons for the transition elements

Answer 2

Outermost s subshell

Next to outermost d subshell

Question 3

What are the valence electrons of the inner transition elements

Answer 3

Outermost s subshell
Next to outermost d subshell
2 levels below outermost f subshell

Question 4

How many valence electrons does Fe have

Answer 4

8

Question 5

What are the valence electrons for elements 3A to 8A?

Answer 5

Outermost s electrons

Outermost p electrons

Question 6

What are the valence electrons for 1A and 2A elements?

Answer 6

Outermost s orbital

Beyond period 2 they might accept electrons into their empty d orbitals

Question 7

How many valence electrons are in Selenium

Answer 7

6

Question 8

How many valence electrons are in sulfur in a sulphate ion

Answer 8

12

Question 9

Different isotopes of one element have different numbers of _______ but the same number of ________.

Answer 9

Neutrons , protons

Question 10

Avagadros number ?

Answer 10

6.02 x10^23

Question 11

If one atom of nitrogen has a mass of 14u, then one mole of nitrogen has a mass of ___g?

Answer 11

14

Question 12

The name of the energy emitted as electromagnetic radiation from matter in discrete bundles

Answer 12

Quanta

Question 13

Angular momentum equation?

Answer 13

L=mvr

Question 14

Kinetic energy equation ?

Answer 14

Mv^2/2

Question 15

Angular momentum of an electron?

Answer 15

L=nh/2pi

Question 16

Rydberg constant

Answer 16

2.18*10^-18 j/electron

Question 17

Electron energy equation

Answer 17

E=-Rh/n^2

Question 18

For the orbital radius ; the smaller the radius, the ______ the energy state of the electron.

Answer 18

Lower

Question 19

Electromagnetic energy of a photon equation

Answer 19

E=hc/wavelength

Question 20

What is the spectrum composed of light at specific frequencies where each line on the emission spectrum corresponds to a specific electronic transition?

Answer 20

Line spectrum

Question 21

The group of hydrogen emission lines corresponding to transitions from upper levels n>2 to n=2.

Also has 4 wavelengths in the visible region

Answer 21

The Balmer series

Question 22

The groups of H emission lines corresponding to transitions between upper levels n>1 and n equals one

Also has higher energy transitions in the UV region

Answer 22

Lyman series

Question 23

The equation showing that the energy of the emitted photon corresponds to the precise difference in difference in energy between the higher energy initial state and the lower energy final state

Answer 23

E= h(6.626x10^-34js)/wavelength = -Rh(1/ni^2 -1/nf^2)

Question 24

What is the Heisenberg uncertainty principle?

Answer 24

It is impossible to simultaneously determine with perfect accuracy the momentum and the position of an electron

Question 25

What is the Pauli exclusion principle

Answer 25

No set of two electrons in a given atom can possess the same set of four quantum numbers

Question 26

What is the position and energy of an electron described by its quantum numbers called

Answer 26

It's energy state

Question 27

What is the maximum number of electrons in an electron shell n

Answer 27

2n^2

Question 28

The difference in energy between adjacent shells decreases as the distance from the nucleus________ ?

Answer 28

Increases

Question 29

What are the first second third and fourth quantum number called? What do they represent?

Answer 29

Principal quantum number = size Azimuthal quantum number =shape Magnetic quantum number =orientation Spin quantum number =spin

Question 30

What are the four subs shells corresponding to L equals 0,1,2,3

Answer 30

Sharp, principal, diffuse, and fundamental subshells

Question 31

Electrons in different orbitals with the same ms values are said to have _______ spins while electrons with opposite spins/ different ms values are referred to as ________

Answer 31

Parallel Paired

Question 32

What is the Aufbau principle ?

Answer 32

Sub shells are filled from lowest to highest energy and each sub shell will fill completely before electrons begin to enter the next one Also the rules states that the lower the sum of the first and second quantum numbers the lower the energy of the sub shell. If two subshells possess the same and n+ L value the sub shell with the lower n value has a lower energy and will fill first

Question 33

Which will fill first the 3-D sub shell or the 4S sub shell?

Answer 33

4s

Question 34

If the principle quantum number of a shell is 2, what types of orbitals will be present ?

Answer 34

S and p L =0(s),1(p)

Question 35

What is the total number of electrons that could be held in a subshell with an angular momentum number equal to 2

Answer 35

10

Question 36

An element with an atomic number of 26 has how many electrons in the 3d shell?

Answer 36

6

Question 37

To determine which subshell has the lowest energy, use the ______ rule

Answer 37

N+ l

Question 38

Energy of a photon equation ?

Answer 38

E= h(6.636 x 10^-34js)x v(frequency)