No, halogens are very reactive elements.
The element with the symbol At is named astatine.
The element AU on the periodic chart stands for gold.
Arsenic
True. Row number on the periodic chart will be the same as the shell number.
Manganese.
chlorine
The element Mg is in the 3rd period of the periodic table.
Yes. Element #23 on the periodic chart.
Technetium, Promethium, and all elements heavier then Bismuth.
Ytterbium #70 on the periodic chart
Element A does not exist on the periodic table. The elements on the periodic table are represented by their respective chemical symbols, such as H for hydrogen, O for oxygen, or Fe for iron.
The Periodic Table