Multiple Choice
In the classification of matter, pizza is best described as which type of substance?
2
views
3. Matter and Energy
Classification of Matter
Struggling with Introduction to Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following substances is an element?
A
B
Air
C
D
Verified step by step guidance1
Understand the definition of an element: An element is a pure substance consisting of only one type of atom, represented by a unique chemical symbol on the periodic table.
Analyze each substance given: H₂O (water) is a compound made of hydrogen and oxygen atoms chemically bonded together.
Air is a mixture of different gases, primarily nitrogen, oxygen, and other components, so it is not a pure element.
O (oxygen) is a chemical symbol representing the element oxygen, which consists of only oxygen atoms.
NaCl (table salt) is a compound made of sodium and chlorine atoms chemically bonded together, so it is not an element.
1:34mWatch next
Master Classification of Matter with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Classification of Matter practice set
Problem sets built by lead tutorsExpert video explanations