Robert leaves a chocolate bar in his car while attending school all day. When he goes to his car in the afternoon, the bar has changed into a gooey liquid. Which statement BEST explains what happened to Robert's chocolate bar?

The second ionization energy of lithium is much greater than the first ionization energy

If z=4.0 and y = 7.2 what is the value of X? Z=y/x

The radius of a barium atom is 2.22e-10 m what is its radius in angstroms

One light-hour is the distance that light travels in an hour. how far is this, in kilometers? (recall that the speed of light is 300,000 km/s)

what activities should you avoid to prevent static discharge while working on a computer

What does berkelium react with

Classifying living things

Find the parent acid and parent base of al2 (co33, determine if they are strong or weak, and determine if the salt is acidic, basic, neutral, or unpredictable.

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure. A second syringe contains 473 mL of N2 at 298 K and 2.6 atm. What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen