In a water molecule, why are the electrons more highly attracted to and spend more time around the oxygen atom, giving it a partially negative charge?

a. hydrogen is negative and repels the electrons

b. the electrons are distributed equally and there are no partial charges in water

c. hydrogen doesn't benefit from the added electrons but oxygen does

d. oxygen has more protons than hydrogen and water's shared electrons are drawn to it

The correct answer is: D. Oxygen has more protons than hydrogen and water's shared electrons are drawn to it  

In water (H2O), each hydrogen atom has one positively-charged proton surrounded by a 'cloud' of one negatively-charged electron. The oxygen atom has a nucleus with eight positively-charged protons, eight uncharged neutrons and eight negatively-charged electrons. Two electron pairs of oxygen are forming covalent bonds with hydrogen, while other two pairs are lone pairs. The eight positive charges in the oxygen attract electrons strongly and this leaves the hydrogen atoms partially positively charged, and the oxygen atom partially negatively charged.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.