which ozone in the upper atmosphere is beneficial to humans ,ozone at ground level is dangerous because

Stratospheric ozone is good because it protects living things from ultraviolet radiation from the sun. Ground-level ozone, is bad because it can trigger a variety of health problems, particularly for children, the elderly, and people of all ages who have lung diseases such as asthma.

hello there,

guys i’m confused.

which rock will weather faster?

answer: b rock

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.