Arsenic is most abundant in the Earth's crust, with higher concentrations found in regions where volcanic activity and mineral deposits are present. Some areas known for having higher levels of arsenic include parts of Asia, especially in countries like China, India, and Bangladesh.
Helium is the first member and the most abundent element in the known universe
The most abundant isotope of arsenic is arsenic-75.
Aluminium.
There is no specific planet that contains the most arsenic. Arsenic is a common element found throughout the universe, including in the Earth's crust and on Mars. The concentration of arsenic varies depending on the location and geological factors.
An ore of arsenic is primarily arsenopyrite, which is a mineral composed of iron, arsenic, and sulfur (FeAsS). It is the most significant source of arsenic and is typically found in hydrothermal deposits. Other arsenic-containing minerals include realgar (As4S4) and orpiment (As2S3), but arsenopyrite is the most economically important. Arsenic is extracted from these ores for various industrial applications, including semiconductor manufacturing and as a preservative.
the second most abundent gas in the atmosphere is oxygen and the first in nitrogen
flour
nitrogen
Nitrogen
Hydrogen
grass
Helium is the first member and the most abundent element in the known universe
Wildebeast
Magnesium
bacteria
probably zooplankton
Insects