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The only alkaline earth metal that has a stable isotope with 20 neutrons is calcium.
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∙ 12y ago
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Which member of alkaline earth metal is least reactive?
Look at any periodic table: Beryllium #4 Magnesium #12 Calcium #20 Strontium #38 Barium #56 Radium #88
Examples of alkaline earth metals?
The alkaline earth metals are Group IIA of the periodic table. Alkaline earth metals are metals with a valency of '+2'. They are:Beryllium (Be)Magnesium (Mg)Calcium (Ca)Strontium (Sr)Barium (Ba)Radium (Ra)
How many neutrons have an atom with a mass number of 20 and 11 neutrons?
How many neutrons would it have if it had 11 neutrons? 11.
What element has 41 neutrons and 20 protons?
This isotope don't exist.Added:That's right, the element with atom number 41 has 41 protons and should be :Naturally occurring niobium which is composed of one stable isotope, 41Nb(93)This means that the mass number (= total of protons AND neutrons) is 93!, so this isotope of Nb has 93-41 = 52 neutrons!As of 2003, at least 32 radioisotopes have also been synthesized, ranging in atomic mass from 81 to 113, so they have 40 to 82 neutrons. This makes the amount of 20 neutrons erronous.However: if the question were 'inverted' to:"What element has 21 (not 41) protons and 20 neutrons" instead, there is a possible more realistic question.The answer to this is: scandium, 21Sc(41) This unstable isotope of Sc, with mass number 41, has 21 protons and 20 neutrons.
What is the symbol of an ion that has 20 protons 20 neutrons and 18 electrons?
The atomic number always equals to the number of protons. which in this case, is 20
What is a alkaline Earth Metal that has 20 nuetrons?
Calcium. Calcium-40 isotope has 20 protons, 20 electrons and 20 neutrons.
Is Ca a metal non metal or metalloid?
Ca is an alkaline earth metal.It has atomic number of 20.
What family does the calcium element belong in?
calcium is in group 2 of the periodic table. that makes it an ALKALINE EARTH METAL 1808
Which member of alkaline earth metal is least reactive?
Look at any periodic table: Beryllium #4 Magnesium #12 Calcium #20 Strontium #38 Barium #56 Radium #88
What element has 20 protons 22 neutrons and a plus 2 charge?
if you mean 2 valence electrons then it should be calcium because it is an alkaline earth metal and when you calculate the number of neutrons using the number of protons, 20 the atomic number, and the atomic mass, 40.078..rounded to 40, you get 20 neutrons.
What is calcium medal nonmedal?
The Element, Calcium: symbol Ca; atomic number 20; atomic wt 40.08 is a Metal in Group IIA, the Alkaline Earth Metals.
What is the Element abuntant from dairy food?
The element that is abundant in dairy food is calcium. Milk is a source of this element. There are other sources of calcium, such as the earth's crust. It is an alkaline earth metal that has the atomic number of 20.
What are the characteristics of calcuim?
Calcium is element 20 on the periodic table with an atomic mass of 40.078 amu. It is an alkaline earth metal and is found in the human body (bones, cells, etc).
What element has 20 electrons and in period 4 and metallic?
Calcium has 20 electrons and has an atomic weight of 40.078 amu. It is in group 2, period 4 of the Periodic Table, and is a soft gray alkaline earth metal.
What element is in period 4 and is metallic and has 20 electrons?
calcium (Ca)
How many electrons do alkaline earth metals have?
Each has 2 valence electrons but the number of total electrons varies with each metal. Here they are for each metal. Beryllium: 4 Magnesium: 12 Calcium: 20 Strontium: 38 Barium: 56 Radium: 88.
How many neutrons does calcium-40 have?
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons
