Answer:
Hydrogen.
Explanation:
Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.
Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.
Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.
However, the chemical element "Hydrogen" is an exception to the octet rule because it is only able to hold a maximum of two (2) valence electrons in its outermost shell to become full.
<em>Hence, Hydrogen is an element which does not want to have eight valence electrons. </em>
The range of the set is 6.8,
because 8.7-1.9=6.8
neurotransmitters is the answer
Sigmoidoscopy is the diagnostic study that the nurse is expected to prepare to evaluate possibility of crohns disease. Crohns disease is an inflammatory bowel disorder which is characterized by ulceration and edema of bowel wall. Sigmoidoscopy which is primary procedure is used to establish diagnosis.
Conceptualize: The operation of metal detectors is based upon the principles of electromagnetic induction. Metal detectors contain one or more inductor coils that are used to interact with metallic elements on the ground.
Analyze: Alexander graham bell invented the first crude metal detector in 1881. As president James Garfield lay dying of an assassin's bullet in 1881, hurriedly invented a metal detector in unsuccessful attempt to locate the fatal slug.