Search results
Results from the WOW.Com Content Network
For instance, grinding a sample to a higher specific surface area increases its reactivity. In impure compounds, the reactivity is also affected by the inclusion of contaminants. In crystalline compounds, the crystalline form can also affect reactivity. However, in all cases, reactivity is primarily due to the sub-atomic properties of the compound.
The atomic number increases within the same period while moving from left to right, which in turn increases the effective nuclear charge. The increase in attractive forces reduces the atomic radius of elements. When we move down the group, the atomic radius increases due to the addition of a new shell. [5] [6] [7]
The abdomen begins to swell due to gas formation. 3–4 days: The discoloration spreads and discolored veins become visible. 5–6 days: The abdomen swells noticeably and the skin blisters. 10–20 days: Black putrefaction occurs, which is when noxious odors are released from the body and the parts of the body undergo a black discoloration.
Taking breaks from sitting every 30 to 60 minutes and moving throughout the day is recommended for everyone, including those who exercise regularly. Sitting still for more than an hour to 90 ...
The change in reactivity caused by a change of voids inside the reactor is directly proportional to the void coefficient. A positive void coefficient means that the reactivity increases as the void content inside the reactor increases due to increased boiling or loss of coolant; for example, if the coolant acts predominantly as neutron absorber.
For example, cocaine can be detected in the blood for two to ten days, while it can be detected in urine for two to five days. The results of post-mortem toxicology testing are interpreted alongside the victim's history, a thorough investigation of the scene, and autopsy and ancillary study findings to determine the manner of death. [7]
The reactivity of a chemical substance is a description of how it might react across a variety of potential chemical systems and, for a given system, how fast such a reaction could proceed. Chemical substances or states can persist indefinitely even though they are not in their lowest energy state if they experience metastability — a state ...
E ea generally increases across a period (row) in the periodic table prior to reaching group 18. This is caused by the filling of the valence shell of the atom; a group 17 atom releases more energy than a group 1 atom on gaining an electron because it obtains a filled valence shell and therefore is more stable.