WorksheetsUnit 2 Periodic Table
Total questions: 20
Worksheet time: 10mins
Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below. Which student’s responses are correct?
Student 1
Student 2
Student 3
Student 4
The periodic table is divided into groups. In general, —
elements that belong to the same group tend to have similar chemical properties.
elements in one group do not tend to bond with elements in other groups.
the groups are based only on atomic numbers.
the groups are based on the number of neutrons in the nucleus.
Aluminum, sulfur, and chlorine are elements found on the periodic table. Tests involving these three elements would show that at normal room temperature —
sulfur is malleable and aluminum conducts electricity
aluminum is malleable and conducts electricity
chlorine is malleable and conducts electricity
all three elements are malleable and conduct electricity
Which pair of properties describes the elements in Group 18?
They are chemically stable and liquid at room temperature.
They have eight valence electrons and are flammable.
They are magnetic and boil at low temperatures.
They are gaseous at room temperature and chemically stable.
Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, a nonmetal, or a metalloid. Which table was completed correctly?
Which statement does NOT correctly compare silicon with another element?
Silicon is a better conductor of electricity than sulfur.
Silicon is less malleable than silver.
Silicon is a solid at room temperature, but argon is a gas.
Silicon conducts electricity as well as copper does.
Which two elements on the periodic table are in the same period?
C and Sn
F and Cl
Mg and Ar
Se and Te
The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?
The element is sodium, and it is highly reactive.
The element is fluorine, and it is not very reactive.
The element is sodium, and it is not very reactive.
The element is fluorine, and it is highly reactive.
The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based on the density ranges in the table. The students most likely have which type of rock?
Coal
Dolomite
Peridotite
Sandstone
A student drew atomic models of four elements. Based on these drawings, which element is the least reactive?
Neon, because it has two energy levels with eight electrons in the second level
Chlorine, because it has three energy levels with seven electrons in the third level
Gallium, because it has four energy levels with three electrons in the fourth level
Tin, because it has five energy levels with four electrons in the fifth level
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?
Will the material float in water?
Does the material feel hard to the touch?
Is the material malleable or ductile?
Does the material feel rough or smooth?
Elements in the group of noble gases typically fail to chemically react with other elements. This is true because noble gases tend to have —
a single valence electron in its outer shell.
a full outer shell of valence electrons.
fewer neutrons than other elements.
more protons than other elements.
A student is studying the ways different elements are similar to one another. Diagrams of atoms from four different elements are shown below. Which two atoms are of elements in the same group in the periodic table?
Atom 1 and Atom 2
Atom 2 and Atom 3
Atom 1 and Atom 4
Atom 3 and Atom 4
Students were asked to identify the location of elements in the periodic table based on clues printed on game cards. Based on the data, which periodic table shows the correct location of the four elements?
A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?
Nitrogen (N)
Sulfur (S)
Arsenic (As)
Silicon (Si)
A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it. Based on this information, the element could NOT be a member of which group on the periodic table?
Group 2
Group 8
Group 12
Group 18
The element sodium (Na) occurs naturally as a light solid with a shiny metallic appearance. The diagram below shows what will happen when a piece of pure sodium is placed in water. This indicates that the properties of the elements in the same column on the periodic table as sodium (Na) have —
the tendency to be highly reactive.
properties of metals and nonmetals.
a full octet of eight electrons in their outer shell.
brittle textures so they disintegrate in water.
A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The density of calcium, which is 1.54 g/cm3
The 2 valence electrons in each atom of calcium
The atomic mass of calcium, which is 40.078 amu
The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below. Which of these elements is in this group?
Lithium
Strontium
Aluminum
Silicon
Electrons in an atom are arranged in layers, or shells. For example, an atom of titanium has two electrons in its innermost electron shell. The next two layers contain eight and ten electrons, and the outermost layer contains two electrons. What does the number of electrons in the outermost shell of an element indicate?
Whether an element is likely to bond with other elements
How many protons and neutrons are in an atom
What state of matter an element is usually found in
Whether an element is radioactive
