Is dark matter related to lead, maybe?

Question

it's got lots of mass but is essentially dead.

Answer 1

No, it is entirely unrelated.

Dark matter does not share the same elementary particles that regular old matter uses.

Answer 2

No

According to Wikipedia:  http://en.wikipedia.org/wiki/Dark_matter

"In physics and cosmology, dark matter is matter that does not interact with the electromagnetic force, but whose presence can be inferred from gravitational effects on visible matter."

Lead can be involved in a chemical reaction, dark matter cannot.  Both are dense, but the density of lead has nothing to do with the density of dark matter.

According to Wikipedia:  http://en.wikipedia.org/wiki/Lead

"Lead has a dull luster and is a dense, ductile, very soft, highly malleable, bluish-white metal that has poor electrical conductivity. This true metal is highly resistant to corrosion, and because of this property, it is used to contain corrosive liquids (e.g., sulfuric acid). Because lead is very malleable and resistant to corrosion it is extensively used in building construction, e.g., external coverings of roofing joints. Lead can be toughened by adding a small amount of antimony or other metals to it."

Dark matter cannot conduct electricity.  Ordinary matter is made up of atoms which are made up of sub-atomic particles that are made up of smaller particles and so on until you come to baryons and radiation.  We can detect both of them; we cannot detect dark matter.  It may be different kinds of material, we don't know.  There could even be several types of dark matter.

The galaxy seems to be composed of star systems with normal matter inside a web of lines of dark matter.  The dark matter doesn't hold things together, for some reason it doesn't exist in our star system and we assume in other star systems.

The only way to detect dark matter is by how its gravity bends light and it takes a lot of dark matter to do that.  We have seen stars in a different position during a solar eclipse because when the star light shines to us from so close to the sun it bends.  When the star is elsewhere in the sky we see it in its normal position.

A tiny bit of dark matter or a thin amount of it could exist inside our solar system, but something would have hit it by now and we would see that.  Also we detect dark matter between stars by the way it bends light and we have mapped it, but only vaguely.  We just don't know what it is.

When you weigh all the contents of the universe that we can see and then calculate the force of gravity caused by it we come up far short of the weight; this means there is a whole lot of matter (most of the universe in fact) that we cannot see.  When we looked for it dark matter was hard to find, eventually we did find webs of it caused by the effects of its gravity.  This doesn't mean that dark matter is as dense as lead, it means that there is a large concentration of it; we don't know its density.

Answer 3

There is no reason to think that lead is anything but ordinary matter. Besides, there are lots of elements which are more dense than lead.