Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. how does this explain the difference in the reactivity of metals within a group?

the valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the top are more reactive than those at the bottom.
the valence electrons of the larger atoms are farther from the nucleus and are harder to remove, so the metals near the bottom are more reactive than those at the top.
the valence electrons of the larger atoms are farther from the nucleus and are harder to remove, so the metals near the top are more reactive than those at the bottom.
the valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.

The valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.

Explanation: The reactivity of metals increase with increase in size of the metal. When the size increases, the number of shells keep on adding and the the nuclear charge also increases.

But the effect of addition of new shells is more dominating as compared to increase in the nuclear charge. Thus the valence shell lies farther from the nucleus and thus the valence electrons are less tightly held by nucleus and can be easily removed and thus the metals at the bottom are considered to be more reactive.

c. 75.7

i think that is the right

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.