Question

Sort these elements into pairs that would most likely exhibit similar chemical properties.

Answer 1

The following pairs of elements would most likely exhibit similar properties:

• Tellurium (Te) and Sulfur (S)
• Potassium (K) and Lithium (Li)
• Neon (Ne) and Krypton (Kr)

Further Explanation

The chemical properties and behavior of elements are determined by the their valence electrons. Elements with the same number of valence electrons will exhibit similar chemical properties.

The number of valence electrons can be determined easily from the periodic table. In the periodic table the elements are arranged in columns and rows. Columns are called the groups and the rows are the periods. From left to right, each group is numbered from 1 to 18. The group number gives information about number of valence electrons of the element:

• Group 1 - 1 valence electron
• Group 2 - 2 valence electrons
• Group 13 - 3 valence electrons
• Group 14 - 4 valence electrons
• Group 15 - 5 valence electrons
• Group 16 - 6 valence electrons
• Group 17 - 7 valence electrons
• Group 18 - 8 valence electrons

Elements that belong to the same group have similar chemical properties.

Potassium and Lithium are both Group 1 element and have one valence electron. They are both very reactive with water. They form an alkaline solution with water.

Neon and Krypton are both Group 18 or Noble Gases. Both elements have filled valence shells with eight electrons and are very stable and quite unreactive.

LEARN MORE

1. Periodic Trends brainly.com/question/2153804
2. Periodic Table brainly.com/question/1446926

Keywords: chemical properties, groups,

Answer 2

You need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. First, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. If they meet these criteria, they will have similar properties.

The first pair: Ne (Neon) and Kr (Krypton), are noble gases found in group 8
The second pair: Li (Lithium) and K (Potassium), found in group 1
The third pair: S (Sulfur) and Te (Tellurium), found in group 6