what state are the elements helium, nitrogen, and oxygen in at room temperature
At room temperature, helium is a gas, nitrogen is a gas, and oxygen is a gas.
At room temperature, the elements helium, nitrogen, and oxygen are in the following states:
1. Helium (He) - Helium is a noble gas and exists as a gas at room temperature. It does not easily liquefy or solidify under normal conditions.
2. Nitrogen (N) - Nitrogen is also a gas at room temperature. It forms about 78% of the Earth's atmosphere and exists as a diatomic molecule (N2).
3. Oxygen (O) - Oxygen is the third most abundant element in the universe and is also a gas at room temperature. It exists mainly as a diatomic molecule (O2), forming about 21% of the Earth's atmosphere.
To determine the state of elements at room temperature, we can refer to the periodic table. Helium (He), nitrogen (N), and oxygen (O) are all elements found in the second period of the periodic table.
At room temperature (around 25 degrees Celsius or 77 degrees Fahrenheit), helium is in a gas state. Helium has a very low boiling point (-268.93 degrees Celsius or -452 degrees Fahrenheit), so it remains a gas even at extremely low temperatures.
Nitrogen is also in a gas state at room temperature. It boils at -195.79 degrees Celsius or -320 degrees Fahrenheit, so it's also typically found as a gas, especially in its most common form of molecular nitrogen (N₂).
Oxygen, on the other hand, is in a gas state at room temperature, but it can also exist as a liquid. Oxygen boils at -183 degrees Celsius or -297 degrees Fahrenheit. So, at very low temperatures, oxygen can condense into a liquid form.
In summary, at room temperature, helium and nitrogen are both gases, while oxygen can exist as a gas or a liquid, depending on the conditions.