Introductory Chemistry Concepts and Critical Thinking by Corwin. With 100% Correct Answers Latest Update 2024

Introductory Chemistry: Concepts and Critical Thinking Chapter 4 Models of the Atom Key Terms 1) What is the term for the weighted average mass of all the naturally occurring isotopes of an element? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above Answer: C Section: Key Terms 2) What is the term for a unit of mass exactly equal to 1/12 the mass of a carbon-12 atom? A) atomic mass unit B) hydrogen atom C) neutron D) proton E) none of the above Answer: A Section: Key Terms 3) What is the term for a symbolic method of expressing the composition of an atomic nucleus? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above Answer: A Section: Key Terms 4) What is the term for the region of very high density in the center of the atom? A) atomic center B) atomic core C) atomic kernel D) atomic nucleus E) none of the above Answer: D Section: Key Terms 5) What is the term for the value which indicates the number of protons for an atom of a given element? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above Answer: B Section: Key Terms 6) What is the term for the atomic model that describes electrons circling the nucleus in an orbit of specific energy? A) Bohr atom B) Rutherford atom C) Thomson atom D) quantum mechanical atom E) none of the above Answer: A Section: Key Terms 7) What is the term for a broad uninterrupted band of radiant energy? A) continuous spectrum B) radiant energy spectrum C) ultraviolet spectrum D) visible spectrum E) none of the above Answer: A Section: Key Terms 8) What is the negatively charged subatomic particle having a negligible mass? A) electron B) neutron C) proton D) quark E) none of the above Answer: A Section: Key Terms 9) What is the term for the shorthand description of the arrangement of electrons by sublevels according to increasing energy? A) atomic notation B) atomic number C) continuous spectrum D) electron configuration E) none of the above Answer: D Section: Key Terms 10) What is the term for the collection of narrow bands of light that results from excited atoms of a given element releasing energy? A) continuous spectrum B) electromagnetic spectrum C) emission line spectrum D) radiant energy spectrum E) none of the above Answer: C Section: Key Terms 11) What is the term for an orbit that electrons occupy at a fixed distance from the nucleus; designated 1, 2, 3, 4 ...? A) energy level B) orbital C) shell D) subshell E) none of the above Answer: A Section: Key Terms 12) What is the term for an electron energy level that results from splitting a main energy level? A) energy sublevel B) orbital C) shell D) subshell E) none of the above Answer: A Section: Key Terms 13) What is the term for the number of times a light wave travels a complete cycle in one second? A) energy B) frequency C) velocity D) wavelength E) none of the above Answer: B Section: Key Terms 14) What is the term for two atoms of the same element that differ by the number of neutrons in the nucleus? A) atomic mass units B) isotopes C) nucleons D) photons E) none of the above Answer: B Section: Key Terms 15) What is the general term that refers to either visible or invisible radiant energy? A) continuous spectrum B) emission spectrum C) line spectrum D) light E) none of the above Answer: D Section: Key Terms 16) What is the term for the value which indicates the total number of protons and neutrons in an atom of a given element? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above Answer: D Section: Key Terms 17) What is the neutral subatomic particle having an approximate mass of 1 amu? A) electron B) neutron C) proton D) quark E) none of the above Answer: B Section: Key Terms 18) What is the term for the spatial region about the nucleus of an atom where there is a high probability of finding an electron with a given energy? A) electron shell B) electron subshell C) orbital D) quantum level E) none of the above Answer: C Section: Key Terms 19) What is the term for a particle of radiant energy? A) electron B) neutron C) photon D) proton E) none of the above Answer: C Section: Key Terms 20) What is the positively charged subatomic particle having an approximate mass of 1 amu? A) electron B) neutron C) proton D) quark E) none of the above Answer: C Section: Key Terms