Science Final Chemistry Questions

Which of the following elements is a halogen? a) chlorine (Cl) b) lead (Pb) c) indium (in) d) argon (Ar) e) lithium (Li)

a) Chlorine (Cl)

Which of the following elements will be most likely to be shiny and flexible? a) Rhodium (Rh) b) Selenium (Se) c) Hydrogen (H) d) Silicon (Si) e) Iodine (I)

a) Rhodium (Rh)

"It is located outside of the nucleus." a) an electron b) a proton c) an electron d) A and B e) B and C

a) an electron

Strontium, Sr (no 38), is especially dangerous to humans because it tends to accumulate in calcium-dependent bone marrow tires (calcium, Ca, no 20). This fact relates to the organization of the periodic table in that strontium and calcium are both a) in group 2 of the periodic table b) made of relatively large atoms c) metals d) soluble in water.

a) in group 2 of the periodic table.

The repeating trends that take place when examining the elements are called _______. a) periodicity b) a group conscience c) the metal shift d) the family cycle e) none of the above

a) periodicity

What do the electron configurations for all the group 18 noble gases have in common? a) They occupy the same number of shells. b) They have the same number of electrons c) Their outermost occupied shells are filled to capacity. d) all of the above

c) Their outermost occupied shells are filled to capacity

Which has more atoms: a 1-gram sample of carbon 12 or a 1 gram sample of carbon 13? a) more information is needed b) a 1-gram sample of carbon 123 c) a 1-gram sample of carbon 12 d) they have the same number of atoms

c) a 1-gram sample of carbon 12

What does the following element description actually mean? "Hydrogen-2" a) a hydrogen with two protons b) two hydrogen atoms c) a hydrogen with one neutron and one proton d) a molecule of hydrogen e) a hydrogen with two neutrons

c) a hydrogen with one neutron and one proton

Which of the following describes a nonmetal? a) good conductor of heat b) malleable c) poor conductor of electricity d) shiny e) ductile

c) poor conductor of electricity

The mass number of an element is ________. a) the sum of the electrons and the protons b) the number of protons c) the sum of the protons and the neutrons d) the sum of the isotopes e) the sum of the electrons and the neutrons

c) the sum of the protons and the neutrons

Which of these is not a metal? a) vanadium (atomic no. 23) b) lithium (atomic no. 3) c) potassium (atomic no 19) d) selenium (atomic no. 34) e) gallium (atomic no. 31)

d) selenium (atomic no. 34)

"It has a relatively large mass" a) an electron b) a proton c) a neutron d) A and B e) B and C

e) B and C

What was Niels Bohr's explanation for the observation of atomic spectra? a) Only certain photons with the correct energy could excite the quanta in the nucleus. b) Electrons could not move in an atom. c) Any photon could excite an electron. d) Nucleons could be excited by different electron energies. e) Electrons could only move in discrete energy steps within an atom.

e) Electrons could only move in discrete energy steps within an atom.

If you remove two protons and two neutrons from a gold atom (Au), what new element is formed (if any)? a) Au b) Re c) Ti d) Au^-2 e) Ir

e) Ir

What is the valence shell? a) It is the same as the orbital configuration. b) It is the last partially filled orbital in an atom. c) It is the shell of electrons in element V (atomic no. = 23) d) It is the shell of electrons in an atom that is the least reactive. e) It is the outermost shell of electrons in an atom.

e) It is the outermost shell of electrons in an atom.

Which of the following is an alkali metal? a) Pb b) Cr c) In d) Ar e) Li

e) Li

If an element has 15 protons and 16 Neutrons and 15 electrons, what is the atomic mass of the element? a) 30 b) 31 c) 16 d) 15 e) none of the above

b) 31

Which of the following best explains what is happening when an atom emits light? a) Heat energy is speeding up the orbit of the electrons and the resulting Doppler shift causes light to be emitted from the electrons. b) An electron is dropping from a higher to a lower energy level with the difference in energy between the two being emitted as light. c) Heat energy is converting a neutron in to a proton and an electron, which is ejected into the orbit of the nucleus, releasing light energy. d) An electron is jumping from a low energy state into a high energy state with the difference in energy being converted to light. e) A proton is undergoing a nuclear change in the nucleus and is emitting a high energy light wave in the process.

b) An electron is dropping from a higher to a lower energy level with the difference in energy between the two being emitted as light.

What is the main tenet of Plank's quantum hypothesis? a) energy can be converted into matter through nuclear quanta. b) energy comes in discrete packets of a certain minimum size. c) energy is composed of subatomic particles called quanta, d) Light is composed of waves that exist only at certain quantum fundamental frequencies. e) Energy is a continuum, but light is quantized.

b) Energy comes in discrete packets of a certain minimum size.

Which of the following statements does not describe a proton. a) It has a positive charge equivalent but opposite of an electron's. b) It orbits around the nucleus of an atom. c) It is a nucleon. d) It is much more massive than an electron. e) It is attracted to negatively charged electrical plates.

b) It orbits around the nucleus of an atom.

How can a hydrogen atom, which has only one electron, have so many spectral lines? a) The atomic radius of the hydrogen atom is relatively large. b) One electron can be boosted to many different energy levels. c) The protons in the nucleus are also giving off various light frequencies. d) The electron is able to move at various speeds.

b) One electron can be boosted to many different energy levels.

Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size? a) Electrons contribute more to an atom's mass while protons contribute more to its size b) Protons contribute more to an atom;s mass while electrons contribute more to its size c) Electrons contribute more to both the mass and size of an atom d) Protons contribute more to both the mass and size of an atom.

b) Protons contribute more to an atom's mass while electrons contribute more to its size.

Which of the following statements describes an isotope? a) element with the same number of protons but a different number of electrons b) element with the same number of protons but with a different number of neutrons c) element with the same number of protons but a different number of electrons d) element with the same number of neutrons but a different number of protons e) none of the above

b) element with the same number of protons but a different number of neutrons

Which of the following elements is a transition metal? a) lithium (li) b) lead (Pb) c) xenon (Xe) d) Silver (Ag) e) chlorine (Cl)

d) Silver (Ag)

Elements that are in the same ______ have a tendency to have very similar chemical properties due to periodic trends. a) compound b) textbook c) row d) group e) period

d) group