What elements touch the staircase in the periodic table and have properties of both metals and non-metals?

can predict the properties of new , because it organizes the elements according to their atomic numbers. Creating new elements is not a simple process. Scientists use a particle...

The periodic trend states that in the same group (column) in have similar properties.

The lanthanides, $Z=58-71$, and the Group 3 metals, scandium, yttrium, and lanthanum, all routinely form largish $M^(3+)$ cations, with very similar chemistries...

Atoms from the same Group of have the same number and symmetry of , and this electronic similarity should give rise to similar chemistry. And indeed it does.......

The modern Periodic Table graphically describes the electronic structure of the . To a first approximation, elements that are members of the same Group have the same number of ,...

$"Colour:"$ some elements are colourless gases; dioxygen gas is colourless, and is one of the most reactive elements on ; the Noble Gases, also colourless, are the least reactive. $"State:"$...

And a copy should be in front of you now if you are doing your chemistry or physics homework. Look at the Table, look at the left most column. You...

And electronic structure directly influences the observed chemistry. And thus is divided into Groups, i.e. the vertical columns, whose members have more or less the same number of , and...

$"Ductility"$...the ability to be drawn out into a wire.... $"Conductivity"$ with respect to heat... $"Conductivity"$ with respect to an electrical current... All of these properties are conceived to arise from...

The solid non metals are amorphous. Unlike metals the non metal solid do not usually form a regular crystal shape. The solid non metals are generally soft and easily broken...