Hydrocarbon structures methopane

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

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.

fe 55.85 g/mol and h2o 18.02 g/mol.

answer seismograph;