Multiple Choice Questions

Match each property to the appropriate subatomic particle.Drag each property into the correct bin.
  • PROTON: symbol p, +1 chargeNEUTRON: symbol n, 0 chargeELECTRON: symbol e, -1 charge
  • Attraction to the positively charged protons in the nucleus
  • protons in an atom
  • MASS OF ~1 AMU: neutron, protonMASS OF ~1/2000 AMU: electron
Chemical equilibrium is reached when _____.
  • The valence shell needs 8 electrons.
  • Weak bonds are transient and easily reversible.
  • the forward and reverse reactions occur at the same rate so that the concentrations of reactants and products remain the same
  • A chemical bond forms when two atoms transfer or share outer electrons to complete their outer shells.
The brackets are indicating a(n) _____ bond.
  • rotation can occur around single bonds.
  • hydrogen
  • single (nonpolar) covalent
Which statement about weak bonds is correct?
  • Weak bonds are transient and easily reversible.
  • A chemical bond forms when two atoms transfer or share outer electrons to complete their outer shells.
  • It can move out to a higher electron shell.It can stay in its original shell.
  • Attraction to the positively charged protons in the nucleus
What type of bond joins the carbon atom to each of the hydrogen atoms?
  • hydrogen
  • rotation can occur around single bonds.
  • double covalent
  • single (nonpolar) covalent
When an electron absorbs the required amount of light energy, it moves from a ________ electron shell to a __________ electron shell, which is _________________ the nucleus.
  • higher...lower...closer to
  • The valence shell needs 8 electrons.
  • All the atoms lie in a plane.
  • lower...higher...farther from
Electrons are held in an atom by attraction to what particle or location?
  • an attraction between ions of opposite charge
  • It can move out to a higher electron shell.It can stay in its original shell.
  • The valence shell needs 8 electrons.
  • Attraction to the positively charged protons in the nucleus
Without making or breaking bonds, the pictured molecule can change its shape because ...
  • single (nonpolar) covalent
  • rotation can occur around single bonds.
  • covalent
Changing the number of _____ would change an atom into an atom of a different element.
  • are different ions
  • electrons in two orbitals.
  • both (a) and (b).
  • protons in an atom
A(n) _____ refers to two or more atoms held together by covalent bonds.
  • ionic
  • hydrogen
  • molecule
  • element
When an electron loses a discrete amount of energy, it moves from a ________ electron shell to a ______ electron shell, which is _____________ the nucleus.
  • All the atoms lie in a plane.
  • lower...higher...farther from
  • The valence shell needs 8 electrons.
  • higher...lower...closer to
The ammonia molecule in the diagram has the observed bond orientation because ... N has 7 protons in its nucleus.N has four pairs of electrons in the valence shell.electrons repel one another.All of the above.None of the above.
  • double covalent
  • 4, 1, 2, 3
  • single (nonpolar) covalent
  • All of the above.
In a double covalent bond, a carbon atom shares ...
  • electrons in two orbitals.
  • All the atoms lie in a plane.
  • 2 electrons.
  • Weak bonds are transient and easily reversible.
What can happen to an electron when sunlight hits it?Select all that apply.
  • PROTON: symbol p, +1 chargeNEUTRON: symbol n, 0 chargeELECTRON: symbol e, -1 charge
  • It can move out to a higher electron shell.It can stay in its original shell.
  • A chemical bond forms when two atoms transfer or share outer electrons to complete their outer shells.
  • Attraction to the positively charged protons in the nucleus
The atomic number of sulfur isSulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound.
  • All the atoms lie in a plane.
  • lower...higher...farther from
  • hydrogen
  • H2S
This atom can form up to _____ single covalent bond(s).
  • 4
  • 1
  • covalent
  • 3
0 h : 0 m : 1 s

Multiple Choice Questions
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