four isotopes of oxygen

These are the elements having same atomic number but different mass number. They have the same atomic number because the number of protons inside their nuclei remains the same. The difference in their mass number is due to the difference in their number of neutrons. Since they are neutral iso..

Isotopes are atoms of the same element having different atomic mass but same atomic number. For e.g., there are three isotopes of hydrogen with atomic mass 1, 2, and 3. According to Mendeleev's periodic table these should be placed at three separate places. However ..

Isotopes - These are the elements having same atomic number but different mass number. They have the same atomic number because the number of protons inside their nuclei remains the same. The difference in their mass number is due to the difference in their number of neutrons. Since they ..

Oxygen is very essential for the existence of human life on Earth. It is the most abundant element on the surface of the Earth. In a free state, it is present in the Earth's atmosphere to an extent of about 21% by volume, (23.15% by mass) In the combined form, it constitutes about 88% by ..

All isotopes of the same element have the same number of protons, but a variable number of neutrons. The isotopes of hydrogen have the following structures (Fig.9.1)...

Most of the oxygen is transported in a combined state. Some of the oxygen is present in solution in the blood. For each decilitre of blood, 4.6ml oxygen enters the blood in the lungs. Of this only 0.17ml remains in the plasma in the solution form. Remaining ..

Tests for Oxygen - 1. Oxygen is a colorless, odorless and tasteless gas. 2. It is neutral to litmus. 3. It rekindles a glowing splinter. 4. When mixed with colorless nitric oxide, it forms reddish brown fumes of nitrogen dioxide. 5. It is absorbed by alkaline..

). As the temperature increases, the solubility of this gas gradually decreases. Although the solubility of oxygen in water is only 4% at STP, it is enough for fish and other aquatic animals and plants to breathe. Remember : STP = Standard temperature and pressure. Temperature =..

To have a better yield of SO 3 , O 2 is used in excess. 3. Conversion of SO 3 into H 2 SO 4 - SO 3 is absorbed in conc. H 2 SO 4 to get oleum. Oleum may then be diluted with calculated quantity of water to get H 2 SO ..

The electrolysis cell consists of a large vessel carrying two electrodes. The electrodes used here are made of platinum. Hydrogen is liberated at the cathode (-), and oxygen is liberated at the anode (+). The gases are collected in two separate cylinders inverted on the electrodes. The vo..