ThatQuiz Βιβλιοθήκη δοκιμασιών Εκτέλεση της δοκιμασίας τώρα
Chapter 4 Multiple Choice and Essay
Συνεισφορά από: Cooper
  • 1. According to John Dalton's observations, when elements combine in a compound,
A) their masses are always equal.
B) their volumes are always equal.
C) the ratio of their masses is always the same.
D) each element contributes an equal number of atoms.
  • 2. Rutherford's gold foil experiment provided evidence for which of the following?
A) There is a dense, positively charged mass in the center of an atom.
B) Alpha particles have a positive charge.
C) Negative and positive charges are spread evenly throughout an atom.
D) Gold is not as dense as previously thought.
  • 3. In an atomic model that includes a nucleus, positive charge is
A) concentrated in the center of an atom.
B) located in the space outside the nucleus.
C) concentrated at multiple sites in an atom.
D) spread evenly throughout an atom.
  • 4. Which subatomic particle has a negative charge?
A) proton
B) electron
C) neutron
  • 5. Which statement about subatomic particles is true?
A) Unlike protons or neutrons, electrons have no mass.
B) An electron has far less mass then either a proton or a neutron.
C) Protons, neutrons, and electrons all have about the same mass.
D) Neutrons have no charge and no mass.
  • 6. Which of the following is unique for any given element?
A) the number of neutrons
B) the mass of the neutron
C) the number of protons
D) the charge on the electrons
  • 7. The number of protons in one atom of an element is the element's
A) mass number
B) isotope
C) charge
D) atomic number
  • 8. To find the number of neutrons in an atom, you would subtract
A) atomic number from mass number
B) isotope number from atomic number
C) mass number from atomic number
D) atomic number from electron number
  • 9. In Niels Bohr's model of the atom, electrons move
A) like popcorn in a popper.
B) like beach balls on water waves.
C) like balls rolling down a hill.
D) like planets orbiting the sun.
  • 10. What does the electron cloud model describe?
A) the precise location of electrons in an atom
B) the mass of the electrons in the atom
C) the most likely locations of electrons in an atom
D) the number of electrons in an atom
  • 11. Which statement about alkali metals is correct?
A) the are extremely nonreactive
B) they are located in the left-most column of the periodic table
C) they form negative ions
D) they are usually gases
  • 12. A mole is an SI base unit that describes the
A) amount of a substance
B) mass of a substance
C) electric charge of a substance
D) volume of a substance
  • 13. Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element?
A) mass number
B) atomic mass unit
C) isotope number
D) atomic number
  • 14. The tendency of an element to react chemically is closely related to
A) its atomic mass
B) the ratio of protons to neutrons in atoms of the element
C) how tightly atoms are packed in the element
D) the number of valence electrons in atoms of the element
  • 15. Which statement is true about oxygen-17 and oxygen-18?
A) They have the same mass number
B) they do not have the same number of protons
C) their masses are identical
D) They are isotopes of oxygen
  • 16. In a periodic table, a set of properties repeats from
A) column to column
B) group to group
C) row to row
D) element to element
  • 17. Which list of elements contains only metals?
A) sodium, chromium, copper
B) phosphorus, nitrogen, oxygen
C) helium, carbon, gold
D) iodine, iron, nickel
  • 18. The usefulness of Mendeleev's periodic table was confirmed by
A) the discovery of the nucleus.
B) the immediate acceptance by other scientists.
C) the discovery of subatomic particles.
D) the discovery of elements with predicted properties.
  • 19. An alkali metal has one valence electron, while an alkaline earth metal has
A) four
B) two
C) none
D) three
  • 20. As you move from left to right across a period, the number of valence electrons
A) increases then decreases
B) increases
C) decreases
D) stays the same
  • 21. The standard on which the atomic mass unit is based is the mass of a
A) carbon-12 atom
B) neutron
C) proton
D) chlorine-35 atom
  • 22. The charge on an electron is
A) -1
B) +1
C) 0
D) -2
  • 23. The relative mass of an electron is
A) 1/18
B) 1/1840
C) 0
D) 1
  • 24. Valence electrons determine an atom's
A) period
B) mass
C) chemical properties
D) number of neutrons
  • 25. Ionization refers to the process of
A) losing or gaining protons
B) changing from lithium into fluorine
C) losing or gaining electrons
D) changing from one period to another
  • 26. An atomic mass unit is equal to
A) one-fifteenth the mass of a nitrogen-15 atom
B) one-fourth the mass of a lithium atom
C) one-twelfth the mass of a carbon-12 atom
D) one-half the mass of a hydrogen atom
  • 27. Which statement about noble gases is correct?
A) they can form compounds with bright colors
B) they are highly reactive
C) they are rare in nature
D) They exist as single elements rather than molecules
  • 28. Semiconductors are elements that
A) do not form compounds
B) can conduct electric current only under certain conditions
C) are extremely hard
D) have large atomic masses but small atomic numbers
  • 29. Carbon and other nonmetals are found in which area of the periodic table?
A) on the left
B) on the right
C) in the middle
D) on the bottom
  • 30. Avogadro's constant in defined as the number of particles in
A) one liter of a pure substance
B) one gram of a pure substance
C) one mole of a pure substance
D) one kilogram of a pure substance.
  • 31. How many protons are in an atom of bromine?
A) 79
B) 35
C) 80
D) 172
  • 32. Explain how isotopes affect an element's average atomic mass.
Οι μαθητές που έκαναν αυτή την δοκιμασία είδαν επίσης :

Δημιουργήθηκε με That Quiz — Δημιουργώντας δοκιμασίες και εκτελώντας δραστηριότητες όλα γίνονται εύκολα στα μαθηματικά και στ` άλλα γνωστικά αντικείμενα.