What are the main properties of oxygen family?
Oxygen is a gas at room temperature and 1 atm, and is colorless, odorless, and tasteless. It is the most abundant element by mass in both the Earth’s crust and the human body. It is second to nitrogen as the most abundant element in the atmosphere.
What are the physical properties for oxygen?
Key Properties
- It is a colorless, odorless and tasteless gas.
- It readily dissolves in cold water.
- It is highly reactive and form oxides with almost all elements except noble gases.
- Liquid oxygen is strongly paramagnetic.
- It exists in three allotropic forms- monoatomic, diatomic and triatomic.
- It supports combustion.
What is the order of electron affinity of oxygen family?
Se > O > S.
What is the property of electron affinity?
The electron affinity is a measure of the attraction between the incoming electron and the nucleus – the stronger the attraction, the more energy is released. The factors which affect this attraction are exactly the same as those relating to ionization energies – nuclear charge, distance and screening .
Why oxygen family is called chalcogens?
-We can call group-16 elements as oxygen family also but that name is not given in the options. -Group-16 elements are also called chalcogens. They are called so because most of the copper ores have copper in the form of oxides and sulphides. They also contain small amounts of selenium and tellurium.
What is the reactivity of the oxygen family?
Reactions and Compounds of Oxygen. As in groups 14 and 15, the lightest element in group 16 has the greatest tendency to form multiple bonds. Despite the strength of the O=O. bond (DO2 = 494 kJ/mol), O2 is extremely reactive, reacting directly with nearly all other elements except the noble gases.
What are the physical and chemical properties of oxygen?
Chemical properties of oxygen – Health effects of oxygen – Environmental effects of oxygen
| Atomic number | 8 |
|---|---|
| Density | 1.429 kg/m3 at 20°C |
| Melting point | -219 °C |
| Boiling point | -183 °C |
| Vanderwaals radius | 0.074 nm |
What are the 3 properties of oxygen?
Physical properties of oxygen
However, oxygen gas is colourless, odourless, and tasteless. Oxygen changes from a gas to a liquid at a temperature of 182.96oC, and then can be solidified or frozen at a temperature of -218.4oC.
Why oxygen has lowest electron affinity in its group?
I’ve read that oxygen has a lower electron affinity (as shown the picture below), because it has a smaller atomic radius than sulfur and thus the electrons experience significant electron-electron repulsion.
Why is the first electron affinity of oxygen negative and the second positive?
So, electron affinity of oxygen is an exothermic process and its value is negative when an extra electron is added to `O^(-)` ion, that second electron experiences a force of repulsion exerted by the negative charge of the anion. so, first this process requires supply of energy from an external source.
Is electron affinity a physical or chemical property?
Ionization Energy and Electron Affinity. The energy needed to remove one or more electrons from a neutral atom to form a positively charged ion is a physical property that influences the chemical behavior of the atom.
On what factors does electron affinity depend?
The three factors affecting the electron affinity of a molecule are Nuclear Charge, Atomic Size, and Electronic Configuration. Nuclear Charge: The greater the nuclear charge, the greater will be the attraction of the incoming electron. This will result in a larger value of electron affinity.
What are the properties of chalcogens?
1. Chalcogen chemistry – the footprint into new materials development
| Property | Oxygen | Sulfur |
|---|---|---|
| First ionization energy (kJ/mol) | 1314 | 1000 |
| Ionic radius (pm)† | 140 (−2) | 184 (−2), 29 (+6) |
| Melting point/boiling point (°C) | −219/−183 | 115/445 |
| Normal oxidation state(s) | −2 | +6, +4, −2 |
What are the physical properties of group 16 17 18?
Physical properties of halogen groups
- All halogens exist as diatomic molecules.
- They are held by weak vander waals forces of attraction. Fluorine and chlorine are gases at room temperature.
- All the halogens are coloured.
- Fluroine and chlorine reacts with water.
Which element is most reactive in oxygen family?
Tellurium (Te) (figure below), a metalloid, and polonium (Po), a metal, are then pursued. They have six valence electrons in all group 16 elements and are very reactive. At room temperature, oxygen is a gas and the other elements in the group are solids.
What is electronegativity in oxygen family?
Oxygen, the first member of the family has maximum electronegativity in its group (3.5) and it shows a decreasing trend on moving down the group due to increase in atomic size as a valence shell electrons decrease.
Which one is not the physical property of oxygen?
Color, phase, odor and boiling point are the physical properties. Reactivity with oxygen depends on the chemical nature of object, thus, it is not a physical property.
Which is a physical property of oxygen quizlet?
A physical property of oxygen is that it is a gas at room temperature. A chemical property of oxygen is that it reacts with iron to form rust.
What is the physical and chemical properties of oxygen?
Is oxygen a chemical or physical property?
oxygen (O), nonmetallic chemical element of Group 16 (VIa, or the oxygen group) of the periodic table.
Which element has lowest electron affinity in oxygen family?
Thus, in case of oxygen and sulphur which are present in the same group, sulphur has greater electron affinity than oxygen. So, out of the given elements to us, nitrogen has the lowest electron affinity.
What does electron affinity depend on?
factor which affect electron affinity are: atomic size and Nuclear charge. As atomic radii increases, electron affinity increase. As nuclear charge increase, electron affinity increase. it decrease down a group and increases across a period.
What are the factors affecting electron affinity?
Is electronegativity a physical property?
Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself.
How do you determine electron affinity?
The amount of energy released when a neutral atom in its gaseous state accepts an electron and gets converted into a negatively charged ion is known as electron affinity. X ( g ) + e − → X − ( g ) + E . A . Therefore, the electron affinity of chlorine is – 349 KJ/mol.