Question

1. explain what atomic radius is measuring and describe the pattern. draw arrows onto the periodic table to show the pattern.

Explanation:

Atomic radius is the distance from the nucleus of an atom to its out - most electron shell. Across a period (left to right), atomic radius generally decreases due to increasing nuclear charge attracting electrons more strongly. Down a group (top to bottom), atomic radius increases as there are more electron shells. To draw arrows on the periodic table, draw arrows pointing left - to - right across periods to indicate decreasing radius and arrows pointing down groups to indicate increasing radius.

Answer:

Atomic radius measures the distance from the nucleus to the outermost electron shell. The pattern is that it decreases across a period and increases down a group. Arrows should be drawn left - to - right across periods for decreasing radius and down groups for increasing radius.