WorksheetsUnit test: Periodic table
Total questions: 50
Worksheet time: 1hrs 8mins
Place the classes of elements in order from most reactive to least reactive. Alkaline earth, alkali metal, transition metal.
Alkali metal, alkaline earth, transition metal.
Transition metal, alkali metal, alkaline earth.
Alkaline earth, transition metal, alkali metal.
Transition metal, alkaline earth, alkali metal.
Place the elements in order of decreasing ionization potential. Cs, K, Li, Na.
Cs, K, Na, Li
Li, Na, K, Cs
Na, Li, K, Cs
K, Na, Li, Cs
The image shows four elements in the periodic table. Which among the following shows the elements correctly ordered by increasing atomic radii?
A) Mg < K < Na < Rb
B) Mg < Na < Rb < K
C) Mg < Na < K < Rb
D) Rb < Na < K < Mg
Copper and gold have similar reactive properties. On the periodic table of the elements, these elements are most likely to:
be in the same group.
be in the same period.
have nearly the same mass.
have the same number of protons.
A positively-charged hydrogen ion has a much smaller radius than a neutral hydrogen atom. Which best explains this difference?
The nucleus is the least dense region of an atom.
Electrons are located far from the nuclei of their atoms.
Most of the volume of atoms is filled with the particles they contain.
The repulsion of protons and neutrons keeps them on opposite ends of atoms.
According to the periodic table, which of the following indicates the correct decreasing order of ionization potential?
Li > Na > K > Cs
Na > K > Li > Cs
Li > K > Na > Cs
Cs > K > Na > Li
The periodic table of the elements was created based on characteristics of elements. The elements are arranged so that elements sharing common characteristics are grouped together. Which characteristic of elements corresponds to a trend in the periodic table of the elements?
abundance in nature
number of neutrons
color in solid phase
radius of atoms
Which model represents a particle with no charge?
5p 6e
11p 12e
4p 5e
7p 7e
Which statement accurately describes a pattern in the size of atomic radii in the periodic table of the elements?
A. Atomic radii decrease from left to right across a period and decrease from top to bottom in a group.
B. Atomic radii increase from left to right across a period and increase from top to bottom in a group.
C. Atomic radii decrease from left to right across a period and increase from top to bottom in a group.
D. Atomic radii increase from left to right across a period and decrease from top to bottom in a group.
The diameter of neutral atoms generally decreases going left to right across one period on the periodic table. What change causes this decrease in diameter of atoms?
The number of outermost electrons decreases.
The number of outermost electrons increases.
The attractive force between the protons and neutrons increases.
The attractive force between the protons and electrons increases.
The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown. Select the three elements from the choices below that are most similar in chemical behavior.
A) Be
B) Ca
C) K
D) Ra
E) Sc
The element sodium, Na, has an atomic number of 11 and an atomic mass of 23.0 atomic mass units (amu). Which of these elements is most likely to have similar chemical reactivity as sodium?
neon, Ne, which has a similar symbol
magnesium, Mg, which has an atomic mass of 24.3 amu
aluminum, Al, which is in the same period on the periodic table
potassium, K, which is in the same group on the periodic table
Chlorine, bromine, and iodine were grouped together in the earliest forms of the periodic table, including the table developed by Mendeleev. What was an organizing principle in this grouping at that time?
Atoms of the three elements had approximately the same mass.
The three elements reacted the same way with other elements.
The elements had the different number of valence electrons.
These three elements were all gases at room temperature.
The image below shows the first two columns of the periodic table. Which of the following sets of elements has the most similar physical and chemical properties?
A) K, Ca, Sr
B) K, Cs, Fr
C) K, Ca, Rb
D) K, Sr, Li
Oxygen belongs to group 16 (6A) in the periodic table. Which atom most likely has properties similar to those of oxygen?
Which reaction would most likely occur when rubidium (Rb) is placed in water?
(select the answer that is more rigorous reaction)
A. oxidizes slightly
B. oxidizes; produces more heat than lithium (Li)
C. oxidizes; produces more heat and smoke than sodium (Na)
D. oxidizes; produces more heat, smoke, and flames than potassium (K)
Using the periodic table of the elements, the properties of elements can often be used to deduce the properties of neighboring elements. In which set can the reactivity of the first three elements be used to most accurately predict the reactivity of the fourth element?
silver (Ag), sodium (Na), strontium (Sr) → sulfur (S)
fluorine (F), oxygen (O), nitrogen (N) → carbon (C)
antimony (Sb), tellurium (Te), iodine (I) → xenon (Xe)
oxygen (O), sulfur (S), tellurium (Te) → selenium (Se)
What is the ground state electron configuration of Br?
2-8-18-7
2-8-18-8
2-3
2-8-17-8
What happens to energy as an atom goes from ground state to excited state?
It increases
It decreases
It remains the same
If an atom has five protons and four electrons, the atom is
positively charged
negatively charged
neutral
What is the ground state electron configuration of Na?
2-8
2-8-2
2-8-1
11
Which of the following shows an excited state electron configuration?
2-7-1
2-4
2-8-4
2-8-1
Light is emitted when an electron moves from the ________ state to the _________ state.
excited, ground
ground, excited
What is the reaction involved if the electron moves from position 1 to 2?
Light will be emitted
Light will be absorbed
The electron will become less excited
The electron will decrease a quantum
The frequency of light is 7.14 x 1014 Hz. What is the energy?
4.73 x 10-19 J
1.20 x 10-48 J
1.13 x 10-17 J
4.97 x 10-49 J
Find the frequency of an electromagnetic wave with a wavelength 2.75 × 10–8 m.
1.10 Hz
1.09 × 1016 Hz
9.17 × 1015 Hz
9.17 × 1016 Hz
oxygen
What group does this element belong to?
1
2
17
18
Which Bohr model represents Neon?
Identify the Oxygen ion
Which Bohr model represents Magnesium Ion?
1s22s22p63s23p64s23d10
The correct electronic configuration of 19K is
1s2 2s2 2p6 3s2 3p6 4s1
1s2 2s2 2p6 3s2 3p6 3d1
1s2 2s2 2p6 3s2 3p5 4s2
1s2 2s2 2p6 3s2 3p5 3d2
Which of the following would have chemical properties similar to the element that has the electron configuration 1s² 2s² 2p⁵?
silicon
lithium
oxygen
chlorine
Which element on the periodic table most likely has physical properties similar to magnesium?
calcium (Ca)
neon (Ne)
phosphorus (P)
potassium (K)
In the electron cloud model of the atom, what does the cloud represent?
the limits of the electron location
the probability of the electron location
the average distance between the electron and the nucleus
the minimum distance between the electron and the nucleus
Hydrogen is a gas at room temperature, but it is found with the alkali metals in group 1 (1A) on the periodic table. Which is the most likely reason hydrogen is grouped with alkali metals?
A. All group 1 (1A) elements have the same number of protons.
B. Alkali metals behave like hydrogen gas at low temperatures.
C. Hydrogen contains 2 neutrons
D. All group 1 (1A) elements have one electron in their outer energy level. Hydrogen contains only 1 electron.
Iron (Fe) is an effective conductor of heat and electricity. Select all of the other elements that most likely to have similar conductivities.
sulfur (S)
nickel (Ni)
krypton (Kr)
bromine (Br)
potassium (K)
Which metalloid is used in solar cells and computer chips?
silicon
silver
arsenic
antimony
In which pair of elements are both metalloids?
A. Sn and Sb
B. Sb and Te
C. Te and I
D. I and Xe
The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table. Which element is classified as a metal?
W
X
Y
Z
A model of an oxygen atom is shown. What is the charge in this oxygen atom?
0
2
6
8
