17 electrons and protons and 18 neutron
Micronutrient: plants need this nutrient in smaller amounts.
Where it comes from: The small deposit of salt in the ground, the plant takes it in when the water disolves it.
What it does to the plant: effects the plants metabolism, helps with the movement of water in photosynthesis.
If the plant does not have it: wilting, no longer supports and feed the tissues
The best fertilizer to use arecalcium chlorine, ammonium chloride or potassium chlorine.