Unit 3Unit 3::Atoms, Ions, Atoms, Ions, Isotopes & Isotopes &
Electron Config.Electron Config.
ReviewReview
• The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is (gold foil experiment)
a. J. J. Thomsonb. Robert Millikanc. Ernest Rutherfordd. William Thomsone. James Chadwick
c. Ernest Rutherford
• A scientist whose “Oil drop experiment” discovered that atoms had positive and negative charges and that they equal each other
a.J. J. Thomsonb.Robert Millikanc. Ernest Rutherfordd.William Thomsone. James Chadwick
• Answer: B: Robert Millikan
• He made their discovery using cathode ray tubes.
a. Niels Bohrb. Robert Millikanc. Ernest Rutherfordd. Erwin Schrodingere. J.J. Thomson
• Answer: E: J.J. Thomson
• He developed the first atomic theory of matter.
a. John Daltonb. Robert Millikanc. Henry Moselyd. Erwin Schrodingere. James Chadwick
• Answer: A: John Dalton
This atomic particle determines the chemical property of an element.a. Protonb. Neutronc. Electrond. Isotope
• Answer: C: Electron
The order in which the subatomic particles were discovered:
A. Proton, Neutron, ElectronB. Electron, Proton, NeutronC. Neutron, Electron, ProtonD. Proton, Electron, Neutron
• Answer: B: Electron, Proton, Neutron
• How many protons, electrons, and neutrons, respectively, does 16
8O have?
• a. 8, 18, 8• b. 8, 8, 8• c. 8, 10, 8• d. 8, 14, 8• e. 8, 18, 16
• ANSWER: b. 8, 8, 8
• The number of neutrons in one atom of Hg is
• a. 82• b. 206• c. 121• d. 288• e. none of these
• ANSWER: c. 121
• How many protons, electrons, and neutrons, respectively, does Al3+ have?
• a. 13, 13, 14• b. 13, 10, 14• c. 13, 13, 27• d. 13, 10, 27• e. 13, 13, 13
• ANSWER: b. 13, 10, 14
• What is the element and number of neutrons for an element with atomic number 26 and mass number 56?
• ANSWER: Fe, 30 neutrons
• The mass number of an atom equalsa. the number of neutrons per atomb. the atomic mass of the elementc. the atomic number of the elementd. the number of protons plus the
number of neutrons per atome. none of these
• ANSWER: d. the number of protons plus the number of neutrons per atom
• Which of the following has the electron configuration 1s22s22p63s23p64s23d5?
• a. Cr• b. Ca• c. Mn• d. Br• e. none of these
• ANSWER: c. Mn
• Which of the following atoms has the electron configuration 1s22s22p63s23p64s23d1?
• a. Sc• b. Ca• c. Sr• d. Ar• e. none of these
• ANSWER: a. Sc
• How many d electrons are there in a iron atom?
• a. 2• b. 3• c. 6• d. 26• e. 56
• ANSWER: c. 6
• The maximum number of electrons in the second principal energy level of an atom is (think: Bohr diagram)
• a. 2• b. 6• c. 8• d. 18• e. 32
• ANSWER: c. 8
Halogen Family contain how many valence electrons?
A. 1B. 5C. 7D. 8
• Answer C: 7
Noble Gases contain how many valence electrons?
A. 1B. 5C. 7D. 8
• Answer D: 8
• The correct electron configuration for Mn is
• a. 1s22s22p63s23p63d7
• b. 1s22s22p63s23p64s23d6
• c. 1s22s22p62d103s23p3
• d. 1s22s22p63s23p64s23d5
• e. none of these
• ANSWER: d.1s22s22p63s23p64s23d5
• 1s22s22p63s23p64s23d7 is the electron configuration for which of the following atoms?
• a. Ca• b. Fe• c. Cr• d. Ar• e. Co
• ANSWER: e. Co
• What element has the noble gas core electron configuration of [Ar] 4s23d8
• Answer: Ni
• The orbital diagram for Oxygen
B
Atomic Trends
1) Which atom has the highest ionization energy?
Ca or Br
1) Which atom has the highest ionization energy?
Br
Atomic Trends
2) Which atom has the highest electronegativity?
F or Mg
Atomic Trends
2) Which atom has the highest electronegativity?
F
Atomic Trends
3) Which atom has the highest ionization energy?
Rb or Ca
Atomic Trends
3) Which atom has the highest ionization energy?
Ca
Atomic Trends
4) Which atom has the highest electronegativity?
O or Si
Atomic Trends
4) Which atom has the highest electronegativity?
O
Atomic Trends
5) Which atom is the largest?
P or F
Atomic Trends
5) Which atom is the largest?
P
Atomic Trends
7) Which atom is the largest?
Be or Ne
Atomic Trends
7) Which atom is the largest?
Be
Atomic Trends
9) Arrange the following atoms in order of decreasing atomic size.
Mg, Cs, Ne, He, N
Atomic Trends
9) Arrange the following atoms in order of decreasing atomic size.
Cs > Mg > N > Ne > He
Atomic Trends
10) Arrange the following atoms in order of increasing ionization energy.
Li, Na, Ne, O, N
Atomic Trends
10) Arrange the following atoms in order of increasing ionization energy.
Na < Li < N < O < Ne
Atomic Trends
11) Arrange the following atoms in order of increasing electronegativity.
F, Na, O, N, K
Atomic Trends
11) Arrange the following atoms in order of increasing electronegativity.
K < Na < N < O < F
Atomic Trends
