Hydrogen vs. Oxygen — What's the Difference?

Hydrogen is the lightest and most abundant element in the universe.

Oxygen is a chemical element with the symbol O and atomic number 8.

Hydrogen has one proton and one electron.

Oxygen supports combustion and is essential for fire.

Hydrogen is a colorless, odorless gas under standard conditions.

Oxygen is a diatomic molecule, often represented as O2.

Hydrogen can be used as a clean fuel source.

A colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.

Hydrogen bonds are weak attractions between molecules.

Oxygen constitutes about 21% of Earth's atmosphere.

A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence its use in filling balloons), and over eleven thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal or vegetable origin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H. Atomic weight 1.

The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Category:en:Oxygen

Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.

Molecular oxygen (O₂), a colorless, odorless gas at room temperature, also called dioxygen.

The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794. Category:en:Hydrogen

(medicine) A mixture of oxygen and other gases, administered to a patient to help them breathe.

An atom of the element.

Oxygen is necessary for aerobic respiration in cells.

A sample of the element/molecule.

Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element in the periodic table.

A nonmetallic element constituting 21 percent of the atmosphere by volume that occurs as a diatomic gas, O2, and in many compounds such as water and silica, and in iron ore. It combines with most elements, is essential for plant and animal respiration, and is required for nearly all combustion. Ozone, O3, is an allotrope of this element. Atomic number 8; atomic weight 15.9994; melting point -218.79°C; boiling point -182.9°C; gas density at 0°C 1.429 grams per liter; valence 2. See Periodic Table.

A colorless, highly flammable element, that occurs as a diatomic molecule, H2, the lightest of all gases and the most abundant element in the universe, used in the production of synthetic ammonia and methanol, in petroleum refining, in the hydrogenation of organic materials, as a reducing atmosphere, in oxyhydrogen torches, in cryogenic research, and in rocket fuels. Atomic number 1; atomic weight 1.00794; melting point -259.1°C; boiling point -252.8°C; density at 0°C 0.08988 gram per liter; valence 1. See Periodic Table.

(countable) An atom of this element.

A molecule of this molecular species

(figurative) A condition or environment in which something can thrive.

A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe

A colorless, tasteless, odorless, gaseous element of atomic number 8, occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.9994.

Chlorine used in bleaching.

A nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust

Hydrogen is a chemical element with the symbol H and atomic number 1. It's the lightest and most abundant chemical substance in the universe, primarily found in stars and gas giant planets.

Oxygen is a chemical element with the symbol O and atomic number 8. It's a member of the chalcogen group on the periodic table and is a highly reactive non-metal. It's essential for respiration in most life forms.

Hydrogen is used in various applications, including the production of ammonia for fertilizers, refining petroleum, and as a fuel source in fuel cells. Additionally, it has potential as a clean energy carrier in the future.

Oxygen is vital for cellular respiration in many organisms. It allows cells to produce energy efficiently from nutrients. Without oxygen, most higher life forms, including humans, would not survive.

Hydrogen and oxygen are distinct elements with different properties. Hydrogen has one proton and one electron, while oxygen has eight protons and eight electrons. While both are gases at room temperature, they have different reactivities, uses, and roles in nature.

Yes, hydrogen and oxygen can be combined in a chemical reaction to produce water (H2O). This reaction is exothermic, meaning it releases energy in the form of heat.

Yes, hydrogen is highly flammable. When mixed with air, it can form explosive mixtures, which is why safety precautions are essential when handling or storing hydrogen.

Hydrogen is primarily produced by steam reforming of natural gas, though there are other methods like electrolysis of water. Oxygen is commonly produced by the fractional distillation of liquefied air.

In high concentrations, oxygen can be dangerous. It can support rapid combustion and increase the intensity of fires. Breathing pure oxygen at high pressures, such as in deep-sea diving, can lead to oxygen toxicity.

No, the air we breathe is primarily composed of nitrogen (about 78%) and oxygen (about 21%), with small amounts of other gases like carbon dioxide, argon, and trace amounts of various others.