The element with the greatest number of valence electrons available for bonding is chlorine. Among all the choices, chlorine is the element that belongs to the higher group number, group 7. Selenium is from group 6. Boron is from group 5, while calcium is from 2. Since the group number also equates to the number of valence electrons, chlorine is the answer.
Manioc is native to tropical south America, where it was grown, processed, and used by many different groups to make bread and porridge. it spread to the Caribbean and other tropical parts of American during pre-Colombian times and was encounter by the columbus on his first voyage to the new world.
Fresh water means water that is good to drink, that is water that is not salty. This excludes oceans and seas: they have salty water.
Most of Earth's freshwater is located in glaciers and ice caps - this is the correct answer. For example the Atlantic ice sheet contains over 60% of earth's fresh water!
The total no. of mass of atom of elements in reactants is equal to the total no. of mass of atom of products
