2. Atoms & Elements

Which part of an atom is mostly empty space?

Which of the following is the number of protons in a sulfur atom?

What is the mass number for an atom of barium containing 56 protons and 82 neutrons?

Which subatomic particle determines the identity of an element?

In which part of the atom is the neutron located?

Which of the following is considered the smallest basic unit of matter?

How many Cl2O molecules of different masses (isotopologues) naturally exist due to the presence of stable isotopes of chlorine and oxygen?

Which term describes the region surrounding the nucleus where electrons are most likely to be found?

Which of the following best describes the electric charge of a single proton?

Which of the following best describes an element?

Which of the following best describes the ground state of an atom?

How many electrons does a neutral atom of zinc contain?

How many electrons are present in a neutral atom of potassium (K)?

What is the smallest unit of gold that retains the chemical properties of gold?

The discovery of the electron as a subatomic particle was a result of which experiment?