What are the most important dissolved elements in ocean water?

The most important are oxygen, hydrogen and sodium and chlorine

Explanation: Oxygen and Hydrogen make up the water molecules in our oceans, meanwhile, sodium and chlorine make up common salt found in the water.

the proximity of water was an advantage to western europe and its culture was able to flourish as a result. trade and travel by sea were easier and safer in historical times.

1. there are no mountains to protect it from the sea

2. and its has wet cool summers and wet, mild winters.