Which staement best describes air pressure at high altitudes? a) air pressure descreases as altitude increases b) air pressure does not change as altitude in creasesc) it is impossible to accurately measure air pressure at high altitudesd) air pressure increases as altitude increases

is has three carbons, so the answer is propylamine.

meth-

eth-

prop-

but-

pent-

hex-

hept-

oct-

non-

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.