How many nonbonding electrons are in CH4?

A) 0 B) 1 C) 2 D) 3 E) 8 A) 0 B) 1 C) 2 D) 3 E) 8

What is the name of the ion whose formula is NO3-?

A) nitrogen trioxide ion B) nitrate ion C) ammonium ion D) sodium oxide ion E) nitride ion A) nitrogen trioxide ion B) nitrate ion C) ammonium ion D) sodium oxide ion E) nitride ion

Draw the Lewis structures of F2,O2 and N2.Which statement is true?

A) All three molecules have a single bond between the atoms. B) B.Both O2 and N2 have double bonds connecting the atoms. C) Fluorine has the shortest bond between the two atoms. D) The bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2. E) All three molecules have triple bonds between the atoms. A) All three molecules have a single bond between the atoms. B) B.Both O2 and N2 have double bonds connecting the atoms. C) Fluorine has the shortest bond between the two atoms. D) The bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2. E) All three molecules have triple bonds between the atoms.

What is the name of Fe2+ in the Stock system?

A) iron 2 ion B) iron(II)ion C) ferric(II)ion D) ferrous 2+ ion E) iron cation A) iron 2 ion B) iron(II)ion C) ferric(II)ion D) ferrous 2+ ion E) iron cation

What statement about the ammonia molecule,NH3,is FALSE?

A) The molecule contains three polar bonds. B) The molecule itself is not polar. C) The molecule has a trigonal pyramidal shape. D) The nitrogen atom has one nonbonding pair of electrons. E) The pull of the electrons in the N-H bonds is toward the nitrogen atom. A) The molecule contains three polar bonds. B) The molecule itself is not polar. C) The molecule has a trigonal pyramidal shape. D) The nitrogen atom has one nonbonding pair of electrons. E) The pull of the electrons in the N-H bonds is toward the nitrogen atom.

Considering the electronegativity values indicated in the table,which covalent bond is the most polar? \(\begin{array} { | c | c | c | c | c | c | } \hline \mathrm { C } & \mathrm { Cl } & \mathrm { F } & \mathrm { O } & \mathrm { N } & \mathrm { H } \\ \hline 2.5 & 3.0 & 4.0 & 3.5 & 3.0 & 2.1 \\ \hline \end{array}\)

A) C?H B) N?O C) Cl?F D) H?F E) F?F A) C?H B) N?O C) Cl?F D) H?F E) F?F

Emergency treatment of cardiac arrest victims sometimes involves injection of a calcium chloride (CaCl2)solution directly into the heart muscle.Which statement about the compound CaCl2 is FALSE?

A) This compound is an ionic compound. B) The cation in this compound is Ca2+. C) The anion in this compound is Cl2−. D) There are two chloride ions in this compound. E) The net charge on this compound is zero. A) This compound is an ionic compound. B) The cation in this compound is Ca2+. C) The anion in this compound is Cl2−. D) There are two chloride ions in this compound. E) The net charge on this compound is zero.