2. Atoms & Elements

Which of the following best describes the difference between an atom and a molecule?

Which of the following defines the atomic number of a given element?

Which of the following best describes the composition of a comet?

Which is one piece of information that the atomic number (9) gives about an atom of fluorine?

Which of the following statements accurately describes elements?

How many electrons does a neutral atom of lithium (Li) contain?

Which of the following is considered the basic form of matter?

At which of the following locations in an atom would you find a neutron?

What is true of all atoms?

Which of the following best explains the relationship between molecules and atoms?

How many protons are present in an atom of aluminum?

How many protons does a francium (Fr) atom have?

The identity of an element can be determined on the basis of which of the following?

Stars are made mostly of which two elements?

How many principal energy levels are present in a neutral sodium (Na) atom?