Periodic Table of Elements - SC.8.P.8.6

(SC.8.P.8.6) Elements are grouped according to their properties in the periodic table. What does the term periodic mean?

• contains a group of similar objects or things
• organized into rows and columns
• based on evidence and organized in a logical way
• occurs at regular intervals

(SC.8.P.8.6) Look closely at part of the periodic table shown below. Notice that the element selenium (Se) has the number 34 directly above its chemical symbol and the number 16 at the top of its row. What do these numbers represent?

• 34 is the atomic number, and 16 is the group number.
• 34 is the atomic number, and 16 is and the average atomic mass.
• 34 is the period number, and 16 is the average atomic mass.
• 34 is the group number, and 16 is the period number.

(SC.8.P.8.6) A part of the Periodic Table is shown below. The elements in the periodic table are ordered according to which of the following?

• atomic number
• color
• melting point
• atomic size

(SC.8.P.8.6) Mario discovered that sodium (Na) is found in Group 1, Period 3 on the periodic table. Where should Mario look for another element that has similar properties?

• on the opposite side of the periodic table
• in Period 3
• in Group 1
• for any other element that begins with the letter N

(SC.8.P.8.6) Elements in the periodic table are grouped into columns and rows. What is the name given to rows in the periodic table?

• periods
• groups
• families
• clusters

(SC.8.P.8.6) Look closely at part of the periodic table shown below. Which of the following pairs of elements have properties that are the least similar?

• He and Xe
• Cl and I
• Ge and Br
• N and P

(SC.8.P.8.6) The halogens are a group of elements on the periodic table that have similar properties. The illustration below shows the right side of the periodic table, including the halogens, group 17. Br (bromine) is in Period 4. Which element is in Period 2?

• I
• F
• At
• Cl

(SC.8.P.8.6) Most versions of the periodic table contain a zigzag line that runs down and to the right as on the part of the table shown below. This zigzag line separates this part of the periodic table into two sections. Aluminum (Al) and tin (Sn) are on the left side of the line, while oxygen (O) and helium (He) are on the right side. What is the purpose of the line?

• to separate magnetic elements from nonmagnetic elements
• to separate the gases from the solids
• to separate the metals from the nonmetals
• to separate the solids from the liquids

(SC.8.P.8.6) Look closely at a part of the periodic table shown below. What element is located in Period 5, Group 4?

• V
• Zr
• Nb
• Ti

(SC.8.P.8.6) Elements are grouped in the periodic table according to the similarities of their properties. For example, the metals are grouped together. Where are the metals located on the periodic table?

• on the left and in the center
• on the right and in the center
• toward the top of the periodic table
• toward the bottom of the periodic table