What element has AR 4s2?
What element has AR 4s2?
iron
What is AR in electron configuration?
[Ne] 3s² 3p⁶
What is the orbital diagram of AR?
The p orbital can hold up to six electrons. We’ll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s if now full we’ll move to the 3p where we’ll place the remaining six electrons. Therefore the Argon electron configuration will be 1s22s22p63s23p6.
Why is potassium in Period 4?
Potassium (K) is an alkali metal, placed under sodium and over rubidium, and is the first element of period 4. It is soft enough to be cut with a knife and it is the second least dense element. Potassium has a relatively low melting point; it will melt just by putting it under a small open flame.
What is the smallest element in Period 4?
Bromine
Where did all the nitrogen come from?
Nitrogen makes up 78 per cent of the air we breathe, and it’s thought that most of it was initially trapped in the chunks of primordial rubble that formed the Earth. When they smashed together, they coalesced and their nitrogen content has been seeping out along the molten cracks in the planet’s crust ever since.
How much does nitrogen cost?
Liquid Nitrogen Price List
| Quantity of Liquid Nitrogen in Liters | Weight in Pounds | Price @ $2/Liter |
|---|---|---|
| 1 Liter | 0.56 | $ 2.00 |
| 2 Liter | 1.12 | $ 4.00 |
| 3 Liter | 1.68 | $ 6.00 |
| 4 Liter | 2.24 | $ 8.00 |
How does nitrogen affect the life of living organisms?
Nitrogen Is Key to Life! DNA carries the genetic information, which means the instructions for how to make up a life form. When plants do not get enough nitrogen, they are unable to produce amino acids (substances that contain nitrogen and hydrogen and make up many of living cells, muscles and tissue).
Why can’t we use nitrogen in the atmosphere?
Although the majority of the air we breathe is N2, most of the nitrogen in the atmosphere is unavailable for use by organisms. This is because the strong triple bond between the N atoms in N2 molecules makes it relatively unreactive. However organisms need reactive nitrogen to be able to incorporate it into cells.
Why is nitrogen important for humans?
It makes 80% of our atmosphere. It is used to make amino acids in our body which in turn make proteins. It is also needed to make nucleic acids, which form DNA and RNA. Human or other species on earth require nitrogen in a ‘fixed’ reactive form.