caption: the increase is due to increasing nuclear charge more protons going across a period
exif: {"Image DocumentName": "The increase is due to increasing nuclear charge (more protons going across a period).", "Image ImageDescription": "A higher positive charge more strongly attracts electrons in the same energy level. Therefore, it is tougher to remove an electron from an atom. Increasing nuclear charge is responsible for both an increasing ionization energy and decreasing atomic radius across a period.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}