AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A water molecule is made of ____
A
All Hydrogen atoms
B
All Oxygen atoms
C
2 Oxygen atoms and 1 Hydrogen atom
D
2 Hydrogen atoms and 1 Oxygen atom
Explanation: 

Detailed explanation-1: -A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That’s why water is sometimes referred to as H2O. A single drop of water contains billions of water molecules.

Detailed explanation-2: -Hydrogen, the smallest of atoms has 1 outer electron, making it have a slightly positive charge (+1). The slightly negative charge of an oxygen atom attracts the slightly positively charged hydrogen atoms. Since oxygen needs 2 electrons, it can attract 2 hydrogen atoms.

Detailed explanation-3: -The chemical formula for water is H2O, which means this molecule has 3 atoms: 2 of hydrogen (H) and 1 oxygen (O) atom.

Detailed explanation-4: -If we want to make 2 water molecules, we will need 4 hydrogen atoms and 2 oxygen atoms.

Detailed explanation-5: -Covalent bonding of a water molecule For stabilization, they share their valence electrons with other atoms. A water molecule is an example of a molecule created through covalent bonding. Water is made up of one oxygen atom and 2 hydrogen atoms, hence the chemical symbol H2O.

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