What is ionic compounds but not for covalent compounds

of those who start drinking before they're 15 will develop alcohol dependence

the backbone of the dna and rna compound is sugar phosphate.

it’s lava came from an explosive eruption

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.