Multiple Choice
Which group on the periodic table is considered the least reactive?
2
views
2. Atoms & Elements
Periodic Table: Group Names
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which element is the alkali metal located in period 3 of the periodic table?
A
Potassium (K)
B
Magnesium (Mg)
C
Sodium (Na)
D
Lithium (Li)
Verified step by step guidance1
Understand that alkali metals are elements found in Group 1 of the periodic table. These elements have a single electron in their outermost shell, making them highly reactive metals.
Recall that periods in the periodic table are the horizontal rows, numbered from 1 to 7, indicating the principal energy level of the valence electrons.
Identify period 3 by counting the rows from the top of the periodic table. Period 3 includes elements with electrons filling the third energy level.
Look for the element in Group 1 (alkali metals) that is located in period 3. This element will have one valence electron in the third energy level.
Recognize that Sodium (Na) is the alkali metal in period 3, as it is the element in Group 1 and period 3, fitting the criteria for an alkali metal in that period.
5:33mWatch next
Master Periodic Table: Group Names with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Periodic Table: Group Names practice set
Problem sets built by lead tutorsExpert video explanations