22
No one knows how many elements are left to discover.
Elements on the left side of the Periodic Table are "Alkali Metals". There is also one non-metal element. H(hydrogen)
He left too many spaces between the elements......
2 elements
There are many reactive elements. They show up more on the upper left of the Periodic Table. Some of these are plutonium, uranium, Mercury and lead.
One.
one
'left' is one syllable.
One
there is no such limitation. you can have any number of form elements
Yes, 3 or 4 times as many elements are metallic. Note, the whole left AND bottom portions of the Periodic Table are metals.
That is correct; the first column on the left contains only elements with one electron in their outer shell, also known as "valance electrons". This column is referred to as Group 1, also known as the Alkali Metals.