Table of Contents
Which substance at STP exists in the form of a monatomic nonreactive gas?
The only chemical elements that are stable single atom molecules at standard temperature and pressure (STP) are the noble gases. These are helium, neon, argon, krypton, xenon, and radon. Noble gases have a full outer valence shell making them rather non-reactive species.
What element is a gas at STP?
The only chemical elements that form stable homonuclear diatomic molecules at standard temperature and pressure (STP) (or typical laboratory conditions of 1 bar and 25 °C) are the gases hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), and chlorine (Cl2).
Which group contains elements that are monatomic gases at STP?
Group 8A elements
In their elemental form at room temperature, the Group 8A elements are all colorless, odorless, monatomic gases.
Which of the following gas is monoatomic?
Helium: Helium is a noble gas having very low reactivity. Therefore, it exists in its elemental form as He. It is monoatomic.
Are gases compressible?
Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles. When a gas is compressed, as when the scuba tank is being filled, the gas particles are forced closer together.
How many elements are gases STP?
eleven elements
There are eleven elements that are gases at STP. In alphabetical order, they are argon, chlorine, fluorine, helium, hydrogen, krypton, neon, nitrogen,…
Which element is a liquid at STP quizlet?
Terms in this set (15) Bromine, 17 – is a liquid nonmetal at STP. As the atomic number of elements within Group 2 increases, the metallic character of each successive element…
Which group contains a liquid at STP?
Only two elements are liquid at STP, bromine and mercury.
Which of the following substances does exist in monoatomic manner?
The noble gases exist as monatomic elements: helium (He) neon (Ne) argon (Ar)