In physics and chemistry, monatomic is a combination of the words "mono" and "atomic," and means "single atom." It is usually applied to gases: a monatomic gas is one in which atoms are not bound to each other. At standard temperature and pressure (STP), all of the noble gases are monatomic. These are helium, neon, argon, krypton, xenon and radon. The heavier noble gases can form compounds, but the lighter ones are unreactive. All elements will be monatomic in the gas phase at sufficiently high temperatures. The only mode of motion of a monatomic gas is translation (electronic excitation is not important at room temperature). Thus in an adiabatic process, monatomic gases have an idealised γ-factor (Cp/Cv) of 5/3, as opposed to 7/5 for ideal diatomic gases where rotation (but not vibration at room temperature) also contributes. Also, for ideal monatomic gases: : the molar heat capacity at constant pressure (Cp) is 2.5 R = 20.8 J K-1 mol-1 (4.97 cal K-1 mol-1); : the molar heat capacity at constant volume (Cv) is 1.5 R= 12.5 J K-1 mol-1 (2.98 cal K-1 mol-1); where R is the gas constant.
No, borax is not monatomic. It is a compound made up of boron, oxygen, and sodium ions.
No, helium is not a compound. It is a monatomic gas, meaning it consists of single atoms of helium.
No, potassium iodide is a compound composed of the monatomic ion K+ (potassium cation) and the monatomic ion I- (iodide anion). It is not a polyatomic ion.
No, sulfur hexafluoride is not an example of a monatomic ion. Sulfur hexafluoride is a compound consisting of one sulfur atom and six fluorine atoms bonded together. Monatomic ions are single atoms that have gained or lost electrons to become charged ions.
The answers have to be include monatomic and plyatomic ions present and ratio between positive and negative ions is one to two, and a group IIA element that loses one half of its total electrons upon ion formation is present, and the sum of the atomic numbers for the two elements involved in the polyatomic ion is 13.
No, borax is not monatomic. It is a compound made up of boron, oxygen, and sodium ions.
Sulfur hexafluoride is not a monatomic ion but in fact a molecular compound.
Because it has to have more than one atom to be a compound.
The sulfate ion (SO4^2-) forms a neutral compound when combined with a group 1a monatomic ion in a 1:2 ratio. This means that for every one monatomic ion from group 1a, two sulfate ions are needed to form a neutral compound.
No, helium is not a compound. It is a monatomic gas, meaning it consists of single atoms of helium.
No, potassium iodide is a compound composed of the monatomic ion K+ (potassium cation) and the monatomic ion I- (iodide anion). It is not a polyatomic ion.
The sulfate ion (SO4^2-) forms a neutral compound when combined with a group 1A monatomic ion such as potassium (K+) in a 1:2 ratio. This results in the formation of K2SO4, which is a neutral compound.
No, sulfur hexafluoride is not an example of a monatomic ion. Sulfur hexafluoride is a compound consisting of one sulfur atom and six fluorine atoms bonded together. Monatomic ions are single atoms that have gained or lost electrons to become charged ions.
Ammonium, NH4+
The answers have to be include monatomic and plyatomic ions present and ratio between positive and negative ions is one to two, and a group IIA element that loses one half of its total electrons upon ion formation is present, and the sum of the atomic numbers for the two elements involved in the polyatomic ion is 13.
'Monatomic' means having or consisting of single atoms.
A chemical compound always consists of two or more elements combined together, and therefore molecules of at least two atoms. A substance which was only one element would simply be a sample of the element. There are some monoatomic elements, the noble gases, helium and group 18 neon argon etc.