Which of the following statements correctly describe the rules which must be observed when drawing resonance structures? (Select all that apply.)
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Resonance forms may differ in the number of multiple bonds present. The placement of atoms and sigma bonds always remains the same. Resonance forms must obey the normal rules of bonding
In the skeletal structure for an organic compound, it is assumed that there is a _____ atom at the end of any line and at the junction of any two lines. This type of structure omits all ________ atoms except those directly bonded to a heteroatom.carbon, hydrogenSelect all statements that correctly describe VSEPR theory.The most stable arrangement keeps electron pairs as far away from one another as possible.
A group is defined as an atom or a nonbonded (lone) pair of electrons.Which of the following statements correctly describe electron orbitals and shells? Select all answers that apply.The second shell contains three p orbitals.
There is only one orbital in the first shell.
The second shell can contain a maximum of 8 electrons.Which of the following statements correctly describe the general rule that governs chemical bonding? Select all that apply.An atom will bond so as to attain a complete valence shell.
An atom will seek to attain the electron configuration of the nearest noble gas.Rank the following bonds from the shortest to the longest. Place the shortest bond at the top of the list and the longest bond at the bottom of the list.Triple, double, singleWhich of the following statements correctly describe the conventions used when drawing condensed structures in organic chemistry? (Select all that apply).Atoms are drawn next to the atoms to which they are bonded
Lone pairs are omittedWhich of the following statements correctly describe the rules which must be observed when drawing resonance structures? (Select all that apply.)The placement of atoms and sigma bonds always remains the same.
Resonance forms may differ in the number of multiple bonds present.
Resonance forms must obey the normal rules of bonding.The formal charge assigned to an atom is calculated by subtracting the number of electrons the atom "owns" from the total number of ______ electrons. The number of electrons "owned" by a specific atom is defined as being the sum of the ______ electrons and half the ______ electrons.valence, unshared, sharedWhich of the following statements correctly describe the conventions used when drawing a skeletal structure for an organic compound? (Select all that apply.)All heteroatoms are drawn and the hydrogens directly bonded to them.
The unlabeled end of a line represents a C atom.
It is assumed that every carbon atom has enough hydrogens to make it tetravalent.When drawing a condensed structure of an organic compound, multiple bond lines are usually ______ while single bond lines are often ______included, omittedEach element has a unique number of _____, which is called its atomic number. In an uncharged atom, this number is also equal to the number of _____ present.protons, electronsLithium bromide (LiBr) is an ionic compound. The metal lithium _____ an electron to form the cation Li+, while the nonmetal bromine _____ an electron to form the anion Br-. The ions are held together by a strong _____ attraction in a crystal lattice.loses, gains, electrostaticWhich of the following statements correctly describe the procedure for drawing a Lewis structure? (Select all that apply.)-A single bond, which represents 2 electrons, should be placed between every two atoms.
-For a neutral molecule the sum of the number of valence electrons for each atom gives the number of electrons used in the Lewis structure.
-An electron is added to the total count for each negative charge on the species.Which of the following statements correctly describe the atomic number of an element? (Select all that apply.)The atomic number is equal to the number of protons in the nucleus.
Each element has a unique atomic number.Arrange the steps involved in drawing a Lewis structure in the correct order. Place the first step at the top of the list and the last step at the bottom of the listcount the valence electrons and place atoms in normal bonding pattern, add an electron for each negative and take one away for each positive, place a bond between every pair, form multiple bonds if needed, assign formal charges to all atoms.Arrange the steps to determine overall molecular polarity in the correct order. Place the first step in the procedure at the top of the list and the last step at the bottom of the list.identify all polar bonds and directions of bond dipoles, determine the geometry of the molecule and decide if the individual bond dipoles cancel or reinforce eachotherAtoms bond in order to achieve a full shell of _____ electrons, leading to a system that has _____ energy and increased stability, compared to the unbonded atoms.valence; decreased
