The video tutorial explains that elements are substances that cannot be broken down by chemical means. Each element is composed of atoms with the same number of protons, which uniquely defines the element.

What is an element in terms of chemical means?

• A substance that can be broken down into simpler substances

• A substance that cannot be broken down by chemical means

• A mixture of different atoms

• A compound of various molecules

What do atoms of the same element have in common?

• The same number of electrons

• The same atomic mass

• The same number of neutrons

• The same number of protons

How is a single element uniquely defined?

• By its chemical reactivity

• By its number of neutrons

• By its atomic mass

• By its number of protons

Which of the following is true about elements?

• They can be chemically broken down into simpler substances

• They are always found in compound form

• They are made up of different types of atoms

• They consist of atoms with the same number of protons

What characteristic is used to exclusively define an element?

• Its chemical symbol

• Its isotopic composition

• Its atomic number

• Its electron configuration