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. Because of this property, it is
used to contain corrosive liquids (e.g. sulfuric acid). Lead can be
toughened by adding a small amount of antimony or other metals to it. Lead
is the only metal in which there is zero Thomson effect. Lead is also
poisonous.
Lithium
Like other alkali metals, lithium has a single valence electron which it
will readily lose to form a cation, indicated by the element's low
electronegativity. As a result, lithium is easily deformed, highly reactive,
and has lower melting and boiling points than most metals. However, these
and many other properties attributable to alkali metals' weakly-held valence
electron are most diminished in lithium, as it possesses the smallest atomic
radius and thus the highest electronegativity.
Magnesium
Magnesium has the symbol Mg, the atomic number 12, and an atomic mass of
24.31. Magnesium is the ninth most abundant element in the universe by mass.
It constitutes about 2% of the Earth's crust by mass, and it is the third
most abundant element dissolved in seawater. Magnesium ion is essential to
all living cells, and is the 11th most abundant element by mass in the human
body.
