How do you know when an element is a solid, liquid, or gas?
Q. I have a chem test tomorrow and I need to be able to tell what element is a solid, a liquid, or a gas with out it being told to me. For example, could be given nitrogen, potassium, sodium, or chlorine and i'd have to know what physical state it's in. Is it related to if it's a metal or non-metal?
Asked by BreAnna - Thu Dec 11 19:48:12 2008 - - 2 Answers - 0 Comments

A. Yes you are right Metals (Group I to Group III) are solid because there are strong metallic bonding within the metal cations and the delocalised sea of electrons. Hence, a large amount of energy is needed to overcome these strong metallic bonds, hence, they have high melting point and they are solids. Non-metals are usually simple discrete covalent molecules with weak dispersion forces between the molecules. Only a small amount of energy is needed to overcome these weak dispersion forces. Hence, they have low melting and boiling points, they are liquid/gases. Under room temperature condition, mercury and bromine are liquids. Nitrogen, oxygen, chlorine, fluorine, hydrogen are gases. The rest most likely are solid.
Answered by eljx2004 - Thu Dec 11 19:56:16 2008

Element lanthanum can the element exist @ all states? what temp does it become a solid, a liquid, and/or gas?
Q. Please help!!! @ what temperature can the element lanthanum become a solid, liquid, and a gas? And can the element exist at all states??? -Chris N :)
Asked by Christopher N - Sat Feb 2 23:23:56 2008 - - 1 Answers - 0 Comments

A. Lanthanum, Atomic Number 57, Atomic weight 138.9065 g/mole Melting Point = 921 C Boiling Point = 3464 C So, yes, Lanthanum can be either a solid, liquid, or vapor, depending on the temperature.
Answered by Dave_Stark - Sat Feb 2 23:54:15 2008

how do you know whether the product is a solid, liquid, or gas at room temperature?
Q. how do you know whether the product is a solid, liquid, or gas at room temperature? in a chemical reaction such as when metallic Na and nonmetallic I2 combine
Asked by Tenzin G - Sat Sep 16 18:07:16 2006 - - 2 Answers - 0 Comments

A. You just have to look up the melting point of the products. Sodium (Na) combines with Iodine (I) to make sodium iodide (NaI). The melting point of sodium iodide is 600 degrees celcius so it is solid at room temperature. You can look up the melting points of compounds on chemfinder.com or on wikipedia.
Answered by MataHari - Sat Sep 16 18:24:59 2006