Which of the following have the most similar properties?

A. Sodium (Na) and Magnesium (Mg)

B. Carbon (C) and Silicon (Si)

C. Argon (Ar) and Chlorine (Cl)

D. Potassium (K) and Calcium (Ca)

What's the ionic equation for lithium + water

A sample of metal has a mass of 19.67 g, and a volume of 5.90 ml. what is the density of this metal?

A chicken farmer stores all of the chicken manure from his farm in large piles next to the river. Throughout the spring and summer, the piles of manure are exposed to rain and wind. The farmer finally removes the manure in the fall.

What type of reaction is this? 2 A1203 (s) + 4 Al (s) + 3 O2 (g)

Boron (B) : 1sE2sF2pG

Determine the name of the compound Li2O

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary