This document discusses the man-made element technetium. It notes that man-made elements are unstable and radioactive, helping to fill gaps in the periodic table. Technetium is a radioactive gray metal, the lightest element with only radioactive isotopes. One isotope, technetium-99m, is commonly used in medical diagnostic imaging scans. The element was discovered by Emilio Segre after being synthesized in the laboratory.

1. MAN-MADE
ELEMENT
A BRIEF DISCUSSION ABOUT A MAN-MADE
ELEMENT
TECHNETIUM

2. MAN-MADE ELEMENTS
MAN-MADE ELEMENTS OR SYNTHETIC
ELEMENTS ARE UNSTABLE CHEMICAL
ELEMENTS AND THEY ARE NOT NATURALLY
FOUND ON THE EARTH. THESE ELEMENTS
ARE SYNTHESIZED IN THE LABORATORY.
ALL OF THEM ARE UNSTABLE AND
RADIOACTIVE IN NATURE, WHICH MEANS
THEY EMIT RADIATIONS AND DECAY INTO
OTHER ELEMENTS. THEIR DISCOVERY
HELPED TO FILL THE EMPTY GAPS IN THE
PERIODIC TABLE, AND THEY WERE LATER
PRODUCED FOR RESEARCH PURPOSES.

3. TECHNETI
UM
>Chemical symbol (Tc)
>Atomic number (43)
>Mass number (97)
>A radioactive shiny gray
metal.
>It is the lightest element
whose isotopes are
all Radioactive.
>Technetium (Tc-99m)
is an isotope commonly
used in a number of
medical diagnostic imaging
scans.

4. sources: https://en.wikipedia.org/wiki/Technetium#History
https://www.rsc.org/periodic-
table/element/43/technetium#:~:text=Technetium%20was%20discovered%20by%20Emilio,
fuel%20rods%20in%20tonne%20quantities.
Emilio
Segre

5. THAT’S ALL
THANK YOU
PRESENTATION BY: ADRIAN R.
OFLAS