(Multiple Choice, 30 pts)

Which is evidence that the reaction below is a redox reaction?
2Na + Cl2 → 2NaCl

A. The sodium atom is a pure element as a reactant and becomes part of a compound.
B. Two different elements take part in the reaction.
C. Oxidation occurs to both elements in the reaction.
D. There are no ions in the equation.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next