Which period on the periodic table do we start to encounter P subshells?

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore