WorksheetsUnit 2 Electrons and Atomic Structure
Total questions: 45
Worksheet time: 28mins
Elements in the same period (horizontal row) have the same number of:
valence electrons
electron shells/energy levels
protons
neutrons
What is an ion?
An atom with a different number of electrons
An atom with a different number of protons
An atom with a different number of neutrons
An atom with a different number of energy shells
An atom with a different quantum number
Which of the following describes a noble gas?
Has an even number of valence electrons
Has a full valence layer
Any of the 7 diatomic elements
Has equal number of protons and neutrons
Why do we study the Big Bang in chemistry class?
All elements were made in the Big Bang
All light was made in the Big Bang
Because the temperatures at the Big Bang were immense
That's where all hydrogen atoms came from and other atoms were made out of hydrogen atoms
Which is the correct Lewis dot for C?
D
E
F
G
H
The frequency of a photon controls the:
color
quantum number
configuration
amplitude
If this atom becomes an ion, what will it do?
lose 4 electrons
gain 8 electrons
gain 2 electrons
lose 2 electrons
Which of the following is the most correct model of the atom?
According to what we've learned in class, silver has the following electron configuration (honors class question)
[Kr] 5s2 4d9
[Kr] 5s1 4d10
[Kr] 5s2 5d9
[Kr] 5s1 5d10
Which of the following could be an electron configuration for an EXCITED carbon atom?
1s2 2s2 2p2
1s2 2s3 2p1
1s2 2s1 2p3
1s3 2s1 2p2
Which element is in the s block?
potassium, K #19
silicon, Si #14
iron, Fe #26
dysprosium, Dy, #66
How many protons does this element have?
6
7
13
12
In an electron configuration, what comes after 3s2?
3p1
3s3
3d1
4s2
Which of the following incorrect models of the atom is the one proposed by Democritus?
Why isn't the atomic mass a whole number?
It takes into account the different ions atoms can form
It takes into account the different charges atoms can form
It takes into account the different isotopes
It takes into account the different protons that atoms can have
What is an isotope?
An atom with a different number of electrons
An atom with a different number of protons
An atom with a different number of neutrons
An atom with a different number of energy shells
An atom with a different quantum number
Which of the following is in the correct order?
Electron is in its normal excited state, releases photon, drops down
Electron is in the ground state, absorbs energy, goes to excited state, drops down and releases photon
Electron absorbs energy, releases photon, drops down to excited state
Electron absorbs energy, releases photon, jumps up to excited state
Explain where the atoms in your body were made.
Hydrogen was made in the Big Bang
Helium through iron are made in stars
Everything after iron is made in supernovas
2 of these are true
All of these are true
Which of these Lewis dot diagrams would show the correct number of dots for an ION of fluorine?
A
B
C
D
H
An element whose electron configuration ends with a p electron is most likely a/an
alkali metal or alkaline earth metal
transition metal
non-metal
lanthanide or actinide
An element whose electron configuration ends with an s electron is most likely a/an
alkali metal or alkaline earth metal
transition metal
non-metal
lanthanide or actinide
An element whose electron configuration ends with a d electron is most likely a/an
alkali metal or alkaline earth metal
transition metal
non-metal
lanthanide or actinide
According to what I've taught you in class, the last part of copper's electron configuration is
4s2 3d9
4s1 3d10
4s2 4d9
4s2 4p9
According to what I've taught you in class, an element whose electron configuration ends with 3d5 must be
chromium, Cr #24
manganese, Mn, # 25
phosphorus, P, # 15
bromine, Br #35
When electron changes its orbit from a higher level to a lower level, energy is
absorbed
released
no change
remains constant
Which element is this?
Helium
Hydrogen
Argon
Silver
Which elements are in the unknown?
Hydrogen and Helium
Lithium and sodium
lithium and helium
lithium and hydrogen
helium and sodium
Which element has a large atomic radius than aluminum?
Magnesium
Chlorine
Silicon
Boron
Of the elements on this list, which is the most electronegative?
oxygen
boron
germanium
francium
Of the elements on this list, which has the lowest ionization energy?
oxygen
boron
germanium
francium
Which elements form cations?
metals
non-metals
metalloids
noble gases
Which elements form anions?
metals
non-metals
metalloids
noble gases
Which of these is WRONG?
A
B
C
D
Which is the correct lewis dot diagram for carbon?
D
E
F
G
H
What is the maximum number of electrons in the p orbital?
2
6
8
10
What is the chemical symbol for ion shown in the image?
S -2
Ar
Ca +2
Ne
What was so great about Mendeleev's periodic table?
He made predictions about unknown elements based on their location on the periodic table
He arranged all elements by atomic number
He was the first to create a list of all known elements
He accidentally discovered plutonium
Which of these orbital diagrams are WRONG? Choose all that apply; you must choose more than one answer!
A
B
C
D
Why are fireworks colored?
Electrons shifting between energy levels
Electrons being ejected from the atom
Electrons moving from one atom to another
Electrons colliding with the nucleus
Which is the correct electron configuration for an oxygen ion?
1s2 2s2 2p4
1s2 2s2 2p6
1s2 2s2
1s2 2s2 2p2
Which is the correct electron configuration for a potassium ion?
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p6 4s1
1s2 2s2 2p6 3s2 3p6 4s2
