When a small piece of sodium is placed in a petri dish with water and phenolphthalein, the sodium becomes a molten ball and darts around the dish, leaving a pink trail. The reactions of potassium, ...

So this shows us that metal oxides are bases, when added to water. Some non-metals can also react with oxygen in ... which shows it is an alkali. A non-metal. Non-metals produce oxides which ...

Reactions of metals with acids Acids react with ... A base that can dissolve in water is also called an alkali.

The paper is published in the journal Water Resources Research. In total, the authors identified 62 metals in their samples and found metal abundances spanned 10 orders of magnitude, with alkali ...