It can block light. Please mark Brainliest!!!
The Nobel gasses
Excluding those, the most active are the lower left and upper right.So the least
active (EXCLUDING GROUP 18) are the non- metals furthest form the upper right
Higher, they have more energy so they move faster
Answer:
<em>Mass of oxygen needed for complete combustion of 6.90 x 10 -03 g CH4 = 2.753 x 10 -02 g</em>