Resource summary

Question 1

Question
Which scientist cut up a piece of material until he discovered what then was thought to be the smallest particle an atom?
Answer
  • Dalton
  • Democritus
  • Rutherford

Question 2

Question
Who discovered the later to be named electron?
Answer
  • J.J Thomas
  • Dalton
  • Bohr

Question 3

Question
What particle did Rutherford shoot at a piece of thin gold foil during his experiment to confirm that an atom is mostly empty space?
Answer
  • Beta particle
  • Soot particle
  • Alpha particle

Question 4

Question
What did Rutherford discover about the atom due to his experiment with firing particles at gold foil?
Answer
  • The atom has a dense positivley charged nucleus in the center of the atom.
  • The atom has electrons which orbit the nucleus in energy levels.
  • Atoms are mostly empty space with negatively charged particles embedded.

Question 5

Question
What of the below evidence supported Bohrs hypothesis that electrons are located at specific energy levels.
Answer
  • Atomic Spectra
  • When compounds are formed
  • Electrolysis of compounds

Question 6

Question
[blank_start]Dalton's[blank_end] Billiard Balls- Conclusion- Atoms are [blank_start]solid spheres[blank_end]. Atoms are of the same element [blank_start]are identical[blank_end]. Evidence- When observing the formation of [blank_start]compounds[blank_end] and the atom rearrangement.
Answer
  • Dalton's
  • Bohrs
  • Rutherfords
  • Democritus
  • solid spheres
  • Hollow spheres
  • small squares
  • identifiable mass
  • are identical
  • vary slightly
  • are different
  • compounds
  • ions
  • molecules

Question 7

Question
When an electron [blank_start]absorbs energy[blank_end] it is [blank_start]excited[blank_end] to a higher energy level. However the electron is [blank_start]unstable[blank_end] in its [blank_start]excited position[blank_end] so in turn [blank_start]drops to[blank_end] any lower energy level. The electron [blank_start]emits energy[blank_end] in the process in the form of [blank_start]light[blank_end].
Answer
  • absorbs energy
  • steals energy
  • light
  • emits energy
  • unstable
  • excited position
  • drops to
  • excited

Question 8

Question
Which of the following terms is the definition of relative isotopic mass?
Answer
  • Isotopic mass is the mass of an atom compared to 1/12 of a carbon-12 atom.
  • Isotopic mass is the mass of an atom compared to a hydrogen-1 atom.
  • Isotopic mass is the mass of an atom compared to 1/16 of a oxygen-16 atom.

Question 9

Question
Which of the followings are correct for the term isotope.
Answer
  • Same amount of protons
  • Different number of electrons
  • Different mass number
  • Different number of neutrons

Question 10

Question
Which of the following is the definition for relative atomic mass?
Answer
  • The weighted average of all naturally occurring isotopes of an element.
  • The weighted average of all isotopes and possible ions of an element.
  • The weighted average of all possible ions of an element

Question 11

Question
What machine in the chemical industry is used to identify elements in a sample?
Answer
  • Mass spectrometer
  • Electrode
  • Calorimeter

Question 12

Question
The peaks on a graph showing the elements found in a sample represent what?
Answer
  • Abundance
  • Relative isotopic mass
  • Neutron number

Question 13

Question
What shape is an 's' orbital?
Answer
  • Sphere
  • Dumbell
  • Oval

Question 14

Question
What shape is a 'p' orbital?
Answer
  • Sphere
  • Dumbell
  • Oval
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