How does atomic radius of an element vary across a period from left to right ?

How does valency of an element vary across a period?

How does th reducing ability of the elements vary across the period from N to At? It:

How does ionisation enthalpy of the elements very as we move across the period from left to right ?

The atomic radii of the elements of second period are given below: (a) Arrange these elements in the decreasing order of their atomic radii (Keeping the element with the largest atomic radius first). (b) Are the elements now arranged in the pattern of a period in the periodic table? (c) Which elements have the largest and the smallest atoms? (d) From this data, infer how the atomic size (or atomic radius) of the elements changes as you go from left to right in a period?

How do atomic radii vary (a) down the group and (b) along the period from left to right?

How do the atomic radii of elements change as we go from left to right in a period of the periodic table?