Introduction
Quick practice
Question 1 of 5
Diamond is the hardest known natural substance. Which of the following features are responsible for this extreme hardness?
A
It is held together by weak forces between independent molecules.
B
Each carbon atom is bonded to four other carbon atoms in a rigid, 3-dimensional tetrahedral structure.
C
It contains free electrons that move throughout the crystal.
D
The carbon atoms are arranged in flat layers that slide over each other.
Get unlimited practice with Foundation subscription
Boost your performance with adaptive practice tests
Practice every concept in the syllabus
Compare your speed and accuracy with your peers
Download the app and practice on the go