name a metal that floats and reacts to it?

Answer 1

Many of the responses you received are correct, although some responders seemed confused, or at least were unaware that sodium and potassium react violently with water. Other metals from the first two groups (on the periodic table) will also react. In fact, the most violent reactor would probably be Francium ... if we had any Francium to put into water.

You are probably interested in learning what the reaction is. It is a replacement reaction, where the very active metal replaces the hydrogen in water, forming a hydroxide (e.g., sodium hydroxide or potassium hydroxide, NaOH or KOH).

This releases hydrogen from the H2O (since OH was used, but the second H in the H2O was not used in the new compound). The hydrogen is released as a gas, which may burn if the reaction releases sufficient heat to ignite it. In that case, the hydrogen reacts with oxygen in the atmosphere to form H2O.

Answer 2

Floating will occur if the weight of water displaced by the metal is more than the weight of the object.... however this is not what you are asking for I presume.

Any metal, less dense than water will float on water. Violent reactions will occur with metals like Sodium and Potassium.

Have you ever seen a piece of Sodium (u can cut it with a knife) placed on water and watched it zig and zag across the plate reacting violently? One of the things that must be seen.

Answer 3

Almost any metal - that doesn't react with the water - in a thin enough sheet will float on the surface due to surface tension.
Try this with a piece of kitchen foil then screw it up into a ball.
RoyS

Answer 4

Pottasium for one but it only floats because of the cushion of nice hot bubbles of gas that surround the lump of metal, created when it reacts with the water (i'm assuming this, but you'd get more accurate answers if you were a little more precise).

Answer 5

Lithium, Sodium, Potassium, Rubidium, Caesium, Frankium.

Answer 6

Iron. They build whopping big things called ships with it. But the sea degrades the iron and the ships can fall apart. So they use paint to stop that happening. the only other one might be Mercury. It floats on the table and consequently in air. But the oxygen in the air eventually turns it into an oxide. nothings for free.

Answer 7

Sodium (Na) floats over water and react with it

Answer 8

Definitely Sodium

Answer 9

iron copper brass steal silver gold will all float if made into a ball shape in fact all the metal you can think off, chopper is the cheapest way cut two pieces hammer out to form a basin shape solder together.after time the copper will darken and go green you can clean it up, polishing will help it to look gleaming and shinning bright

Answer 10

Mercury