Question

Which of the following describes an element?

I. Is a pure substance made entirely of one type of atom
II. Can be broken down into simpler substances
III. Has unique sets of properties
IV. Is represented by chemical symbols

Answer 1

An element is a pure substance made entirely of one type of atom. It cannot be broken down into simpler substances and has unique physical and chemical properties. Elements are represented by chemical symbols. Elements are represented by chemical symbols, such as H for hydrogen and O for oxygen.

Step-by-step explanation:

An element is a pure substance made entirely of one type of atom. It cannot be broken down into simpler substances by ordinary chemical means. Each element has its own unique set of physical and chemical properties. Elements are represented by chemical symbols, such as H for hydrogen and O for oxygen.

pure substance made entirely of one type of atom. It cannot be broken down into simpler substances and has unique physical and chemical properties. Elements are represented by chemical symbols. Elements are represented by chemical symbols, such as H for hydrogen and O for oxygen.