According to the law of conservation of matter, the total amount remains constant despite changes.

Unit One, Lesson Three: The Periodic Table of Elements This week, our homeschooling science unit on matter continues with the Periodic Table of Elements. There are 118 elements, but only 92 occur naturally. The remaining elements have only been made in laboratories and are unstable.

Prepare to embark on an exciting journey as we explore the fantastic world of matter!