Sodium is a white alkali metal, almost chalky in appearance
Sodium-23 the only isotope occuring in nature has 12 neutrons
i assume you are saying NaCl. It is a compound since it has two elements in it namely sodium and chlorine. An element however is an uncombined substance like only sodium
Sodium chloride is easily dissolved in water because it is a polar compound.
Table salt, or sodium chloride (NaCl), is the most common sodium compound found in nature and widely used in food preparation and preservation.
Sodium occurs naturally in the Earth's crust, typically in minerals such as halite (rock salt) and then extracted through mining and evaporation processes. It is also found in seawater and can be extracted through processes like solar evaporation or electrolysis. Sodium is an essential element for both biological processes and various industrial applications.
Look at a Periodic Table.
That depends on the pressure, but under normal pressure, sodium is a solid at room temperature.
Sodium lamps can be dimmed but we shall have to look at the effect of low voltage on lamps
Bleach contains Sodium hypochlorite and it is an alkali.
Sodium thiopental is a white crystalline powder that is water-soluble. It is typically provided as a sterile powder for injection in vials.
Sodium is a highly reactive element that easily forms compounds with other elements, such as chlorine in the form of sodium chloride (table salt). This tendency to react with other substances means that pure sodium is not typically found in nature. Instead, sodium is usually found in compounds in minerals or in seawater.
Sodium Nitrate is a salt, the product of the reaction of an acid with a base. For instance, Sodium Hydroxide plus Nitric Acid would form the salt Sodium Nitrate and Water. NaOH + HNO3 = NaNO3 + H2O