An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

This is the main structural axis of the plant that supports leaves, flowers and fruits; transports fluids; stores nutrients and produces new tissue.