All of the halogens, group 17, have seven valence electrons. which of these would represent the oxidation number of the halogens such as chlorine and bromine?

3Pb2 + (aq) + 2Cr (s) → 3Pb (s) + 2Cr3 + (aq) What is the number of moles of electrons gained by 3.0 moles of lead ions?

Given the balanced equation representing a reaction: 2NaCl → 2Na + Cl2 To break the bonds in NaCl, the reactant must (1) absorb energy (3) destroy energy (2) create energy (4) release energy

What two atoms are isotopes pf one another?

The biochemical code for eye color is transmitted from parents to offspring by

If the solvent-solute interactions in a mixture are the solvent-solvent interactions and the solute-solute interactions, a homogeneous solution forms.

Who created the periodic table and in what year?

Why is uranium 235 the most commonly used isotope for nuclear fission in current uses in nuclear power generation?

Based upon the pH scale, a vegetable with a pH of 5.3 would be

How many grams of Cl are in 535 g of CaCl2?

2. An object experiences an acceleration, g, when it is on the surface of a planet of radius R. What will be the acceleration on the object after it has been moved to a distance of 4R from the center of the planet? A) 168 B) 48 C) 1/4 g D) 1/16 g