Answer:
Xe
Explanation:
Cs and Na are solids in room temperature while F and Xe are gases.
The number of electrons in the outermost shell of an atom will determine its reactivity. Out of the gases given Xe and F, F ( the most electronegative element) posses 5 valence shell electrons which makes it highly reactive while Xe which is a noble gas posses 8 valence shell electrons which makes it less reactive compared to many elements.
<span>Coronary arteries supply blood to the heart muscle.</span>
Skin is the Largest barrier agaisnt Pathogens which include Bacteria which cause infections.
Answer:
During meiosis Prophase I, crossing over occurs which increases genetic diversity.
Explanation:
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