WorksheetsReview and reinforce 2
Total questions: 45
Worksheet time: 32mins
The electron configuration of an atom is 1s22s22p6 The number of electrons in the atom is
3
5
6
10
The number of electrons in the 3d orbital of the atom of atomic number 27 is
5
6
7
10
Pauli's exclusion principle states:
lower energy orbitals fill before higher energy orbitals
one electron goes into each orbital until all of them are half full before pairing up.
no two electrons can be identified by the same set of quantum numbers (i.e. must have different spins).
the position and the velocity of an electron cannot both be measured exactly, at the same time, even in theory.
Fe3+ ions have which electron arrangement?
1s2 2s2 2p6 3s2 3p6 3d6 4s2
1s2 2s2 2p6 3s2 3p6 3d5
1s2 2s2 2p6 3s2 3p6 3d3 4s2
1s2 2s2 2p6 3s2 3p6 3d4 4s1
The statement that an electron occupies the lowest available energy orbital is
Hund's Rule
AUfbau principle
Bohr's law
The Pauli Exclusion principle
The sequence in which energy sublevels are filled is specified by
the Pauli exclusion principle.
Aufbau principle
Orbital's rule
Lyman's series.
The atomic sublevel with the next highest energy after 4p is
4d
4f
5s
5p
What is incorrect about this orbital diagram?
Both arrows in the filled 2p box should be pointing the same direction
In the there should only be 1 arrow in the first 2p box and one in the 2nd 2p box
There is nothing incorrect with this diagram
All the arrows should be pointing the same direction.
How many orbitals are present in the n = 3 main energy level?
A. 12
B. 3
C. 9
D. 7
Which is the correct orbital diagram (arrows in boxes) for a carbon atom?
A
B
C
D
Which is the correct orbital diagram (arrows in boxes) for the 4s and 3d orbitals in the Fe3+ ion?
A
B
C
D
State the maximum number of electrons that can be placed in the first electron shell of an atom.
1
2
6
8
State the maximum number of electrons that can be placed in the second electron shell of an atom.
24
18
8
2
This diagram shows the electron arrangement of a sulphur atom. How many protons must be there in a sulphur atom?
18
4
16
90
There may be a maximum of ____ p orbitals at a given energy level.
2
6
3
8
This shape is that of
s-orbital
d-orbital
p-orbital
f-orbital
The spin of an electron is represented by this variable:
n
m
L
ms
This is the shape of ____ orbital
s
d
p
d
Which of the following shows a proper pair of the l value with the orbital shape.
0=f
3=p
1=s
2=d
As the energy level goes higher, the electrons
have lower in energy
are more stable
are weaker
are farther from the nucleus
How many electrons total are found in the f orbital?
2
6
10
14
What is the correct representation for an orbital which has an "n" value of 4 and an "L" value of 2?
4d
4s
4f
4p
What does the 1 in "1s" stand for?
energy level
s orbitals
p orbitals
the number of electrons
The higher the principal quantum number, the lower the orbital energy.
True
False
The possible values for the principal quantum numbers are: n= 0,1,2,3,4
True
False
A principal shell with a value of n=3 would contain s, p, d, and f orbitals.
True
False
How many protons are in Sodium?
11
22
12
33
How many neutrons are in Magnesium?
36
12
24
6
How many electrons are in Aluminium?
40
27
13
14
How many protons are in Silicon?
7
42
28
14
The vertical (up and down) columns in the Periodic Table are called
groups
towers
periods
atomic numbers
What did Rutherford's gold-foil experiment help him conclude?
The mass of the atom is equivalent to the number of protons alone.
The mass of the atom is negligible.
The mass of the atom is mostly located in a small nucleus.
The mass of the atom is equivalent to the number of neutrons alone.
The first person with evidence supporting concept of atoms was...
JJ Thomson
Ernest Rutherford
John Dalton
Democritus
Which conclusion was a direct result of the gold foil experiment?
An electron has properties of both waves and particles.
An atom is composed of at least three types of subatomic particles.
An electron has a positive charge and is located inside the nucleus.
An atom is mostly empty space with a dense, positively charged nucleus.
Which scientist postulated that electrons exist in orbits of fixed energy levels?
(and travel around the nucleus the way that planets travel around the sun)
Ernest Rutherford
Niels Bohr
JJ Thomson
John Dalton
In the late 1800s, experiments using cathode ray tubes led to the discovery of the...
(hint... it was the first subatomic particle discovered)
proton
nucleus
electron
gamma ray
atomic spectra
Which experiment used alpha particles to show that atoms were mostly empty space but had a dense, positively-charged nucleus?
cathode ray experiment
electrolysis of water
gold foil experiment
atomic spectra experiments
How many valence electrons does this element have?
12
8
2
10
How many valence electrons does this element have?
1
2
3
4
An element will always have the same number of
