Based on the data for alkali metals and noble gases, how does the atomic size change within a group?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

During which time interval does the object travel approximately 10 meters