Iron, copper, gold, aluminum, brass, titanium, zinc. I believe all metals are heavier than water but some thin sheets of metal such as Aluminum can float due to its bouyancy. You can probably cut anything into small enough size such that it would float. BTW, I can make steel float----in liquid lead.
Yes, there are 3. Lithium, potassium and sodium. However, all 3 are very reactive, and you do not want to put them in water. Bad chemical reaction if you do.
If you're floating metal on water, there are only a couple or three metals that have a density so low that they'll float on water. Those metals are lithium, potassium and sodium. Any one of these will float on water, and they are listed in order of increasing density with sodium just a bit less dense than water. Note that all of these metals will react violently with water, so we're setting this issue aside here. Be clear about that.
Lithium, sodium, and potassium all float on water. Sodium and lithium both react with the water to give off hydrogen gas - they look a bit like fizzies when they do it. They can give off enough heat to light the gas, so they burn as they float around if there is enough oxygen to support a flame. I imagine potassium would act the same way, but I have never seen it personally. Beryllium, the lightest element in the alkaline earth group, is more dense that water, and would not float.
Nonexistent ones. Salt water is denser than fresh water, so any object which floats in water will also float in salt water.
What sediment float in the water
NO! Gasoline and oil will float on water. Also: add ethanol or methanol and the water will be suspended in the fuel and be burnt without any problems. alcohol is good for the car too.
The alkaline metals react with water, and Lithium and Sodium float on the water whilst reacting.
rocks, metals ect.
If the proposal is to float the metal on water, most metals won't float. That's because most metals are more dense than water and will sink. Note that this proposition sets aside any reaction that might occur between the metal and water. This is because there are some metals that react with water, and some react violently. See the link below to the related question about the metals that will float on water. There aren't many of them. If the metal you are considering isn't on the list of metals that willfloat on water, then it won't.
Such metals are Sodium and Potassium (and all the alkali metals).
It will sink in water, but it will float in mercury. Depends on what the liquid is.
Metals have a high density and they feel heavy so as magnesium is a metal it will not float in water due to the tight compression on the molecules packed in it.
Hardness, ability to float or sink in water and so on.
Any object that is less dense than water will float.
If the can is empty, and you avoid water from entering it, it will float without any trouble.
Any item that is lighter than the water will float on the surface of the water.
An object will float on water if it has less density than the water. Or than any other liquid on which it is supposed to float.
Pumice.