I need help with this ASAP

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.