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The element with a mass number of 19 could be fluorine, which is a halogen and a gas, but not a noble gas.
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What elements mass is 30 and a noble gas but not neon?
There is no such noble gas with an atomic mass of 30. The mass of neon is 20 and the mass of the next noble gas, argon, is 40
What is a gas and has as mass number of 19?
Fluorine is a gas with a mass number 19.
Is a noble gas with 48 neutrons and a mass of less than a 100?
The noble gas with 48 neutrons and a mass of less than 100 is krypton-84.
Gas with mass number 19?
The answer is Fluorine!Argon, one of the noble gases.
What is the noble has gas with the lowest atomic mass?
Helium with an atomic mass of 4.00260
What is a noble gas with a mass of less than 15?
Helium
What is the heviest noble gas?
Noble gases belong to group 0 and can be found on the extreme right column of the periodic table of elements. The heaviest noble gas would be radon, whose atomic mass is still uncertain. The element which appears below radon in the column, ununoctium, has not been confirmed as a noble gas.
What element is a gas and has a mass number of 19?
The fluorine-19 isotope.
What is the noble gas with lowest atomic mass?
Atomic mass increases from top to bottom and left to right on the periodic table. In each row, the noble gasses have the highest atomic mass. As you travel down that column, also called a group or family, the noble gasses increase in atomic mass. The naturally occurring noble gas with the highest atomic mass is Radon (Rn; atomic mass = 211.4 amu). In 2002, the unstable element Ununoctium was synthesized, and although it is a member of group 18, it was later determined to be a solid at room temperature, so it is not classified as a noble gas.
In certain mass of gas the number of atoms and the number of moleucules are equal How?
The gas has molecules that are single atoms, as do the noble gases.
Is krypton halogen noble gas or neither?
No, it is a noble gas
What is An inert gas with a greater atomic mass then helium?
Helium is the lightest noble gas, so neon, argon, krypton and xenon are all heavier noble gases. Radon's also a noble gas and it's heavier than helium, but it's radioactive so is it really inert?
