Below is the Lewis structure of the chloroform (CHC13) molecule. H :C1: C:C1: : CI: Count the number of bonding pairs and the number of lone pairs around the hydrogen atom. bonding pairs: lone pairs: 0 X

The table below includes the bond enthalpy (the energy required to separate the diatomic molecule into its atoms) and the bond length for each diatomic molecule. Diatomic Molecule Bond Enthalpy (kJ/mol) Bond Length (pm) Cl2 243 199 O2 498 121 N2 945 110   Identify the observed trend between bond enthalpy and number of shared electrons: as the number of electrons shared between two atoms increases, the bond enthalpy (  increases  /  decreases  /  remains unchanged  ).   Identify the observed trend between bond length and number of shared electrons: as the number of electrons shared between two atoms increases, the bond length (  increases  /  decreases  /  remains unchanged  ).

Explain why CH4 is one of the most common molecules found in nature. Are the bonds between the atoms ionic or covalent? What is the difference between an ionic bond and a covalent bond?

How do you find the total number of valence electrons for OF2? What is the central atom? How many atoms are single bonded to the central atom? How many atoms are double or triple bonded to the central atom? How many lone pairs are on the central atom?

Decide if each of the electron dot pictures, shown below for the indicated molecules, is an acceptable Lewis structure.     Lewis structure of O2? Lewis structure of CO?

Which of the following represent the Lewis structure for Cl? O :: O :CI: O CI: O-CI:

Chemistry not physics

**The molecule has a net charge of -1

Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure :Z: : H H-Ö N — -0. : 0: :Z: ] — :Z: N=N C1: : Is the proposed Lewis structure reasonable? Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* 0 Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* * If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0".

Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure : H :Z: :Z: N H I H-N-H Is the proposed Lewis structure reasonable? Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* 0 Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* 0 * If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0".