Question

Which of the following statements is true?

Boiling and melting points are chemical properties.
A molecule of oxygen can have atoms of carbon in it.
Elements are substances made of only one type of atom.
The number of electron shells in an atom is called the atomic number.

Answer 1

ELEMENTS ARE SUBSTANCES MADE OF ONLY ONE TYPE OF ATOM

Explanation:

An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.