Multiple Choice
Which element has protons in its nucleus?
2
views
4. Atoms and Elements
Periodic Table: Element Symbols
Struggling with Introduction to Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which element makes up most of Earth's atmosphere?
A
Argon (Ar)
B
Carbon (C)
C
Oxygen (O)
D
Nitrogen (N)
Verified step by step guidance1
Understand that Earth's atmosphere is composed of several gases, with some elements and compounds present in larger amounts than others.
Recall that the major components of the atmosphere include nitrogen (N\_2), oxygen (O\_2), argon (Ar), and trace amounts of other gases like carbon dioxide (CO\_2).
Recognize that nitrogen gas (N\_2) makes up the largest percentage of the atmosphere by volume, approximately 78%.
Note that oxygen (O\_2) is the second most abundant gas, making up about 21%, while argon (Ar) is a noble gas present at about 0.93%.
Conclude that among the given options, nitrogen (N) is the element that makes up most of Earth's atmosphere.
4:01mWatch next
Master Periodic Table: Symbols Concept with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Periodic Table: Element Symbols practice set
Problem sets built by lead tutorsExpert video explanations