Atomic size decreases across a period due to an increase in the effective nuclear charge, zeff. a. true b. false

It is a true statement that atomic size decreases across a period due to an increase in the effective nuclear charge, zeff.

Atomic size is a periodic trend that decreases across the period. Across the period, more electrons are added without a corresponding increase in the number of shells.

Also, the effective nuclear charge, zeff increases across the period as more positive charges are added to the nucleus. As such, the attraction between the nucleus and electrons increases leading to a decrease in atomic size.

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The answer is true. As you move across the periodic table, the elements have a higher atomic charge due to an increase in the number of protons and neutrons. Since the neutrons have no charge, the protons (that have a positive charge) attract the electrons clouds that are negative in charge (unlike poles attract). The more the protons in an atom, the more the attraction on the electron orbits so they get closer to the nucleus of the atoms. This is the reason the atomic diameter reduces across the periodic table.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

i'm sorry, but can you list the answers? i cannot with something i don't know the answers to

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chris