2. Atoms & Elements

How many protons does an atom of argon (Ar) contain?

Which is a characteristic of the nucleus of an atom?

The proton has a mass of approximately:

Which of the following is considered the smallest particle of an element that retains its chemical properties?

Which four elements make up the majority of the human body by mass?

Which type of electric charge is carried by all protons in an atom?

How many electrons does a neutral fluorine atom have?

An orbital is defined as a region of the most probable location of which of the following?

A pure chemical substance that consists of only one type of atom is called a(n):

Which of the following correctly represents the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons?

Which of the following particles make up the nucleus of an atom?

What is the atomic number of boron?

An ion has 106 electrons, 162 neutrons, and a nuclear charge of +108. What is the mass number of this ion?

All atoms of a given element have the same ________.

Which process is primarily responsible for the formation of elements heavier than iron in the universe?