Na20
how many atoms of each element are in this compound?
a) 2 sodium atoms and 1 oxygen atom
b) 2 sodium atoms and 2 oxygen atoms
c) 1 sodium atoms and 1 oxygen atoms
d 1 sodium atom and 2 oxygen atoms

A)2 sodium atom and 1 oxygen atom

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.