HEART DISEASE is the number one cause of death in the United States, for women as well as men. The various forms of heart disease, which. include coronary artery disease (CAD), high blood pressure, atheroÂ­. sclerosis, heart failure and heart attacks, are responsible for over. 250,000 deaths a year among women. Research-based strategies to promote.
A: A valence electron is a type of electron present in an atom that works to aid in the process of chemical bond formation with other atoms. These electrons a... Full Answer > Filed Under: Atoms & Molecules.
A lone pair on the oxygen atom in water contributes two electrons to form a coordinate covalent bond with a hydrogen ion to form the hydronium ion. Similarly, a lone pair on nitrogen contributes 2 electrons to form the ammonium ion. All of the bonds in these ions are indistinguishable once formed, however.