The astronaut then measures the abundance of strontium on the new planet, obtaining the following results: isotope abundance (%) mass (amu) 86sr 9.46 85.91 87sr 7.00 86.91 88sr 83.54 87.91 what is the atomic mass of strontium for this planet? express your answer to two decimal places, and include the appropriate units.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.