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» 1. What is the atomic number of chlorine?
Answer: 17
» 2. What is the atomic mass of sodium?
Answer: 22.99 amu
» 3. What is the mass number of the most
common isotope of Silicon?
Answer: 28
» 4. What term represents the protons +
neutrons?
Answer: mass number
» 5. What term represents the number of
protons?
Answer: atomic number
» 6. What term represents the average mass of
all of the isotopes?
Answer: average atomic mass
» 7. The average atomic mass of Potassium is
39.10 amu. Which isotope, K-39, K-40, or K-41
is the most abundant?
Answer: 39, because the atomic mass is closest to the most abundant isotope
» 8. When the mass number and atomic number
is known, how does one find the number of
neutrons?
Answer: mass number minus atomic number
» 9. What is the mass of a proton?
Answer: 1 amu
» 10. What is the general formula for finding
average atomic mass?
Answer: % x mass + % x mass…..
» 11. Boron has two naturally occurring isotopes,
B-10 (19.8% abundant) and B-11 (80.2%
abundant). Calculate the atomic mass.
Answer: 10.80 amu
» 12. Calculate the average atomic mass of
Magnesium. Mg-24 (78.99%), Mg-25(10.00%),
Mg-26 (11.01%).
Answer: 24.32 amu
» 13. For Zn-64 what is the number of atomic
number, mass number, number of protons,
neutrons, and electrons?
Answer: 30, 64, 30, 34, 30
» 14. How many electrons has Mg2+ lost from its
original number?
Answer: 2
» 15. How many total electrons does Ca2+ have?
Answer: 18
» 16. An atom with the same number of protons,
but a differing number of neutrons.
Answer: isotopes
» 17. What do the superscript and subscript from
40 K represent?
19
Answer: 40 is the mass number and 19 is the atomic number
» 18. Which family on the periodic table is in the
first group?
Answer: alkali metal
» 19. Which family of the periodic table has 8
valence electrons (except the top element)?
Answer: noble gases
» 20. Which section of the periodic table has
properties of both metals and nonmetals?
Answer: metalloids
» 21. Which isotope of Neon has the same
number of neutrons as it does protons?
Answer: Ne-20
» 22. An atom becomes a cation, or positive,
when…
Answer: it loses electrons
» 23. An atom becomes an anion, or negative,
when…
Answer: it gains electrons
» 24. How many protons and neutrons does H+
have?
Answer: 1 proton and 0 neutrons
» 25. Which scientist was a Greek philosopher and
said that the atom was “indivisible”?
Answer: Democritus
» 26. Which scientist worked under E. Rutherford
and discovered neutrons?
Answer: Chadwick
» 27. Which scientist used the gold foil experiment
and discovered that the atom was mostly empty
space and the positive charges were located in the
nucleus?
Answer: Rutherford
» 28. Which scientist was an English schoolteacher
and said that atoms of the same element were
exactly the same and that atoms of different
elements combined together to form compounds?
Answer: Dalton
» 29. Which scientist thought that electrons were
scattered around the atom like raisins in plum
pudding?
Answer: Thomson
» 30. Which scientist thought that electrons orbited
the nucleus in energy levels?
Answer: Bohr
» 31. Which scientist used cathode rays to
discover a subatomic particle?
Answer: Thomson
» 32. Which scientist used gold foil to discover
subatomic particle placement?
Answer: Rutherford
» 33. The lowest allowable energy state of an
atom is the…
Answer: ground state
» 34. There are four types of orbitals, they are..
Answer: s, p, d, f
» 35. Which two families on the periodic table
end in the configuration s1 or s2?
Answer: alkali metals and alkaline earth metals
» 36. Which block of the periodic table are the
transition metals?
Answer: d
» 37. Which block of the periodic table are the
lanthanide and actinide series’?
Answer: f
» 38. How many total electrons can be placed
into the p orbitals?
Answer: 6
» 39. How many total electrons can be placed
into the d orbitals?
Answer: 10
» 40. Which rule says that each electron occupies
the lowest energy ?
Answer: Aufbau principle
» 41. Which rule says that a maximum of 2
electrons may occupy a single atomic orbital,
but only if the electrons have opposite spins.
Answer: Hund’s Rule
» 42. Which rule says that single electrons with
the same spin must occupy each equal-energy
orbital before additional electrons with
opposite spins can occupy the same orbitals?
Answer: Pauli Exclusion Principle
» 43. What is the electron configuration of
Sodium?
Answer: 1s22s22p63s1
» 44. What is the electron configuration of
chlorine?
Answer: 1s22s22p63s13p6
» 45. What is the electron configuration of Iron?
Answer: : 1s22s22p63s13p64s23d6
» 46. What is the noble gas configuration of
Zirconium?
Answer: [Kr] 5s24d2
» 47. What is the noble gas configuration of
Terbium?
Answer:[Xe] 6s25d14f8
» 48. What is the noble gas configuration of
potassium?
Answer: [Ar] 4s1