Chemistry Regents Review…
DAY #1
…30 Q’s For 30 Days
Read the following questions and answers carefully. Place the number of the best answer choice on the line provided.
____1. Which particles have approximately the same mass?
(1) alpha particle and beta particle
(2) alpha particle and proton
(3) neutron and positron
(4) neutron and proton
____2. Which phrase describes an atom?
(1) a negatively charged nucleus surrounded by positively charged protons
(2) a negatively charged nucleus surrounded by positively charged electrons
(3) a positively charged nucleus surrounded by negatively charged protons
(4) a positively charged nucleus surrounded by negatively charged electrons
____3. An orbital is defined as a region of the most probable location of
(1) an electron
(2) a neutron
(3) a nucleus
(4) a proton
____4. The bright-line spectrum of an element in the gaseous phase is produced as
(1) protons move from lower energy states to higher energy states
(2) protons move from higher energy states to lower energy states
(3) electrons move from lower energy states to higher energy states
(4) electrons move from higher energy states to lower energy states
____5. An atom of lithium-7 has an equal number of
(1) electrons and neutrons
(2) electrons and protons
(3) positrons and neutrons
(4) positrons and protons
____6. The mass of a proton is approximately equal to the mass of
(1) an alpha particle
(2) a beta particle
(3) a positron
(4) a neutron
____7. What must occur when an electron in an atom returns from a higher energy state to a lower
energy state?
(1) A specific amount of energy is released.
(2) A random amount of energy is released.
(3) The atom undergoes transmutation.
(4) The atom spontaneously decays.
____8. What is the number of electrons in a completely filled second shell of an atom?
(1) 32
(2) 2
(3) 18
1
(4) 8
Chemistry Regents Review…
DAY #1
…30 Q’s For 30 Days
____9. Which diagram represents a mixture of two different molecular forms of the same element?
____10. What is the number of electrons in an atom that has 3 protons and 4 neutrons?
(1) 1
(2) 7
(3) 3
(4) 4
____11. As a result of the gold foil experiment, it was concluded that an atom
(1) contains protons, neutrons, and electrons
(2) contains a small, dense nucleus
(3) has positrons and orbitals
(4) is a hard, indivisible sphere
____12. Which statement describes the distribution of charge in an atom?
(1) A neutral nucleus is surrounded by one or more negatively charged electrons.
(2) A neutral nucleus is surrounded by one or more positively charged electrons.
(3) A positively charged nucleus is surrounded by one or more negatively charged electrons.
(4) A positively charged nucleus is surrounded by one or more positively charged electrons
____13. Which particle has the least mass?
(1) alpha particle
(2) beta particle
(3) neutron
(4) proton
(3) 0
(4) 1
____14. A neutron has a charge of
(1) 1
(2) 2
____15. A sample of matter must be copper if
(1) each atom in the sample has 29 protons
(3) the sample melts at 1768 K
(2) atoms in the sample react with oxygen
(4) the sample can conduct electricity
____16. In the electron cloud model of the atom, an orbital is defined as the most probable
(1) charge of an electron
(2) conductivity of an electron
(3) location of an electron
(4) mass of an electron
____17. Which nuclear emission has the greatest penetrating power?
(1) proton
(2) beta particle
(3) gamma radiation
2
(4) positron
Chemistry Regents Review…
DAY #1
…30 Q’s For 30 Days
____18. Nuclei of U-238 atoms are
(1) stable and spontaneously absorb alpha particles
(2) stable and spontaneously emit alpha particles
(3) unstable and spontaneously absorb alpha particles
(4) unstable and spontaneously emit alpha particles
____19. The dating of geological formations is an example of a beneficial use of
(1) isomers
(2) electrolytes
(3) organic compounds
(4) radioactive nuclides
____20. Which particle diagram represents the arrangement of F2 molecules in a sample of fluorine at
95K and standard pressure?
____21. Every chlorine atom has
(1) 7 electrons
(2) 17 neutrons
(3) a mass number of 35
(4) an atomic number of 17
____22. What is the charge of the nucleus of an oxygen atom?
(1) 0
(2) +2
(3) +8
(4) +16
____23. Which substance can not be broken down by a chemical change?
(1) ammonia
(2) methanol
(3) propane
(4) phosphorus
____24. During a nuclear reaction, mass is converted into
(1) charge
(2) energy
(3) isomers
(4) volume
____25. Compared to the mass and the penetrating power of an alpha particle, a beta particle has
(1) less mass and greater penetrating power
(2) less mass and less penetrating power
(3) more mass and greater penetrating power
(4) more mass and less penetrating power
____26. An atom in the ground state has two electrons in its first shell and six electrons in its second
shell. What is the total number of protons in the nucleus of this atom?
(1) 5
(2) 2
(3) 7
3
(4) 8
Chemistry Regents Review…
DAY #1
…30 Q’s For 30 Days
____27. A bromine atom in an excited state could have an electron configuration of
(1) 2-8-18-6
(2) 2-8-18-7
(3) 2-8-17-7
(4) 2-8-17-8
____28. In the ground state, which atom has a completely filled valence electron shell?
(1) C
(2) V
(3) Ne
(4) Sb
____29. Which equation represents natural transmutation?
(1)
(2)
+
→
→
+
+
(3) S + 2e- → S2(4) Na → Na+ + e-
____30. What is the total number of years that must pass before only 25.00 grams of an original 100.0
gram sample of C-14 remains unchanged?
(1) 2,865 y
(2) 5,730 y
(3) 11,460 y
4
(4) 17,190 y