Which of the following statements correctly describe nitrogen and its role as a plant nutrient?
-nitrogen is a macronutrient in plants.
-nitrogen-fixing bacteria in the soil convert n2 to nh3.
-nitrogen is a component of nucleic acids, proteins, hormones, and coenzymes.
-plant roots can only absorb nitrogen in the form of ammonium ions (nh4+) or nitrate ions (no3−).
-nitrogen deficiency usually causes plant leaves to turn yellow.

The p sub shell can hold up to 8 electrons in an atom. true or false?

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced

Stage in which a typical star has completely stopped fusion