Which of these describes atomic radii as one moves from top to bottom within a group? the atomic radius decreases from top to bottom within a group. the atomic radius does not vary in any predictable way within a group. the atomic radius is the same within a group. the atomic radius increases from top to bottom within a group?

Which of these describes atomic radii as one moves from top to bottom within a group? the atomic radius decreases from top to bottom within a group. the atomic radius does not vary in any predictable way within a group. the atomic radius is the same within a group.

correct answer

the atomic radius increases from top to bottom within a group?

Option (d) is the correct answer.

Explanation:

In a group, on moving down from top to bottom there occurs an increase in atomic size due to addition of electrons into the new shells of elements.

For example, lithium and sodium are same group elements. Atomic radius of lithium is 182 pm and atomic radius of sodium is 227 pm.

Whereas when we move across a period then there occurs a decrease in atomic radius of the atoms due to addition of electrons into the same shell.

Therefore, we can conclude that the statement atomic radius increases from top to bottom within a group, is true.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

thats a little if u want the answer just look it up on google thats what i do haha : )