The gas that living things need to survive is composed to two oxygen atoms covalently bonded to each other (O2). A- humans artificial bond molecules together so we don’t run out of useable oxygen. B- Oxygen does not have a full nucleus of protons, and therefore binds with other molecules to fill each of their nuclei. C- Oxygen is a very sticky element and therefore gets stuck to also other atom floats past. D- Oxygen does not have a full valence electron shell, and therefore binds with other molecules to fill each of their shells. HELPP PLS !

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

there is none because earth is stationary and flat.

the answer is na (sodium)