2. Atoms & Elements

Which feature defines a neutral atom?

Which of the following is the number of protons in a lead (Pb) atom?

Which of the following best describes the structure of an atom?

Which subatomic particle is found in the nucleus of an atom and has a positive charge?

Which of the following is the number of protons found in an atom of iodine?

Which of the following correctly identifies the subatomic particles found in the nucleus of a nitrogen atom?

What is the total number of individual atoms present in a single molecule of water (H_2O)?

Which element corresponds to an atom that has 29 protons?

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

Atoms of a specific element always have a constant number of _____.

Chemists assign atoms to chemical elements by counting their:

How many silicon atoms are present in one molecule of SiH_4?

Which statement best describes how an atomic model can be used to explain the charge of the particles in Thomson's cathode ray beams?

Which type of atom is present in both water (H2O) molecules and carbon dioxide (CO2) molecules?

Which of the following is an example of an element?