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Isotopes of curium have masses between 232 and 252. It is your choice to subtract 1oo from (232 to 252) and to found an isotope.
I have the same homework!!! The answer is calcium. - Linz
The most important isotope of curium has an atomic weight of 247; 247-100 is 147. This is the mass of an important isotope of promethium.
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∙ 13y ago
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∙ 13y agoThe atomic weight of cerium is 140,116; 140-100=40.
The atomic weight of calcium is 40,078.
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∙ 12y agoyour moms vag
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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.
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.
What element has a mass of less than 30 and is a noble gas?
Neon's mass is the element closest to 30 out of all noble gasses.
What gas element has an atomic mass less than 30 is not neon and is a noble gas?
helium (He)
The atomic mass of iodine is less than the atomic mass?
The atomic mass of iodine is less than the atomic mass of all elements with greater atomic number.
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.
Is the element cerium common or scarce?
Although cerium belongs to chemical elements group called rare earth metals, it is in fact more common than lead. Cerium is available in relatively large quantities (68 ppm in Earth's crust). It is used in some rare-earth alloys.
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.
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.
What element has 48 neutrons and a mass less than 100?
Cadmium atomic number is 48. so, it can have 48 protons and neutrons and electrons each. it has mass less than 100. 96cadmium has 48 protons and 48 neutrons. 96 means its mass i.e, number of protons and number of neutrons
What element has a mass of less than 30 and is a noble gas?
Neon's mass is the element closest to 30 out of all noble gasses.
