]if a sample of pure iodine contains 4.69 x 1022 atoms of iodine, how many moles of iodine are in the sample? a=0.08 b=0.13 c=7.78 d=12.84

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.