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Neon's mass is the element closest to 30 out of all noble gasses.
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∙ 13y ago
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∙ 11y agoHelium (mass = 4 amu) and neon (mass = 20 amu)
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∙ 11y agohelium and neon with atomic masses 4 and 20 respectively.
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∙ 11y ago(He) - helium
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∙ 14y agoHelium (He)
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∙ 14y agoHelium (He)
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∙ 11y agohelium
Jeaven Ray
chlorine
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What gas element has an atomic mass less than 30 is not neon and is a noble gas?
helium (He)
What element is a halogen gas with a mass less than 25?
Fluorine, at 19 atomic mass units, is the only halogen gas that fits that requirement.
Which element are not noble gases?
A noble gas is an element on the farthest right hand side of the periodic table. (They go down vertically) It is also known as group 18. Any element other than one of those is not a noble gas.
If a single atom of an unidentified element has a mass of 3.818x10-23 g What is the element?
The mass number can be found by multiplying the mass of a single atom by Avogadro's number, that is 6.022 X 1023. In this instance, the product is 23.0, and the element is probably sodium, which has this gram atomic mass. mass number is less than 1, which does not correspond to any real, stable atom. The element could conceivably be a rare isotope of neon or magnesium.
Are all noble gases lighter than air?
No. The molar mass of dry air is 28.97 g/mol. Noble gases are monatomic, so their atomic mass represent their molar mass. From this we can tell that helium and neon are less dense (lighter) than air, while argon (atomic mass 39.9) onwards are denser than air.
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.
What is a noble gas with a mass of less than 15?
Helium
What gas element has an atomic mass less than 30 is not neon and is a noble gas?
helium (He)
What element has an atomic mass greater than 75 but less than 79?
Element 34, Selenium, has an atomic mass of about 78.96.
What element can have the atomic number 118 and also the mass number 50?
No element can have those features; the mass can never be less than the atomic number in any element.
Elements in my family usually form covalent bonds. We have two fewer valence electrons than the noble gases. I am almost twice as heavy than the lightest element in my group. What element am i?
Sulfur: The periodic column containing elements with two fewer electrons than the noble gases is column 16, in which oxygen, the lightest element, has a mass number of 16. Sulfur, the next element in this column, has a mass number of 32.
What is an element that is a Halogen Gas and with a mass less than 15?
No halogen gas has a mass of under 15 atomic mass units. The closest is fluorine, at 19.0 atomic mass units.
What element has mass less than thirty?
well a lot of elements have atomic mass so then you would have to look at the periodic table to find the right answer
Why can an element have the same atomic mass as another element?
Two elements can have the same atomic mass if one has more or less neutrons than protons in the nucleus. These are called isotopes. not much to im prov thank you
What element is a halogen gas with a mass less than 25?
Fluorine, at 19 atomic mass units, is the only halogen gas that fits that requirement.
What is the element with the least atomic mass is hydrogen or helium?
Hydrogen's atomic mass (1 amu for the most stable isotope) is less than that of helium (4 amu).
Does a radioactive element become stable after its mass number become less than 82?
Not always -- Hydrogen-3 is radioactive, for example.
