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What is 3 quarters of the 90 naturally occurring elements?
3 quarters of the 90 naturally occurring elements are called metals.
What are three properties that all minerals have in common?
they are natural, inorganic, and crystalline solids
Which correctly lists the three elements that geologists measure to determine the age of an organism’s remains?
Geologists measure the amount of carbon-14 present, the ratio of parent isotopes to daughter isotopes in radioactive decay, and the layers of rock surrounding the fossil to determine the age of an organism's remains.
Is chlorine reactive?
Yes, Chlorine is highly reactive and dangerous even at low concentrations. If it is extremely dilute it can be safely added to water to kill bacteria that are dangerous to people.
What are the only three naturally occurring magnetic metals?
The three naturally occurring magnetic metals are iron, nickel, and cobalt. These metals have strong magnetic properties due to their atomic structure, which allows them to align their magnetic domains and create a magnetic field.
What is the most common isotope for potassium?
Potassium has three naturally occurring isotopes: potassium-39, potassium-40, and potassium-41. The most common isotope is potassium-39, which makes up about 93% of naturally occurring potassium.
Does ogygen have any isotopes?
Yes, oxygen has three naturally occurring isotopes: oxygen-16, oxygen-17, and oxygen-18. Oxygen-16 is the most abundant, making up about 99.76% of naturally occurring oxygen.
Is silicon radioactice?
Naturally occurring silicon, of which there are three isotopes, is not radioactive, There are a half dozen artificial radioisotopes.
Is uranium naturally occurring or is it syntherically made?
Uranium has three natural isotopes: 234, 235 and 238; also uranium has ca. 25 artificial isotopes.
How many stable isotopes does hydrogen have?
Hydrogen has three stable isotopes: protium (1H), deuterium (2H), and tritium (3H). Among these, protium is the most abundant, making up over 99.98% of naturally occurring hydrogen.
What is Argon's isotope notation?
Argon has three naturally occurring isotopes: ^{36}{18}Ar, ^{38}{18}Ar, and ^{40}_{18}Ar.
What are the seventeen isotopes in potassium?
I believe 24 isotopes have been identified with atomic mass ranging from 32 to 55. Only three occur naturally, K39 (93% of the total), K41 (7%) and the radioactive K40 (0.01%). The others have very short half-lives, as small as a few nano-seconds in some cases.
How does potassium-19 differ from potassium-41?
The nomenclature "potassium-19" is not commonly used because it is redundant. The 19 in potassium-19 would indicate the number of protons in potassium. All isotopes of potassium have 19 protons. Therefore 19 is known as the atomic number of potassium. Potassium-41 is one of the three naturally occurring isotopes of potassium. It has 19 protons and 22 neutrons, giving it an atomic mass number of 41.
What element is the most radioactive lithium sodium or potassium?
Potassium is the most radioactive among lithium, sodium, and potassium. Potassium has a naturally occurring radioactive isotope, potassium-40, which is present in all potassium samples and contributes to its radioactivity.
What is the mass number of potasium?
Potassium occurs naturally on earth in three isotopes with mass numbers 39, 40, and 41. Of these, the isotope K-40 is known to be radioactive, but has a very long half life. There are many other radioactive isotopes of potassium.
What element is an example of a homogenous mixture?
No element is a mixture of any chemical type, because by definition an element is a chemical substance that can not be broken down into simpler substances by chemical means. However, many elements can be separated by physical means into isotopes that differ from one another in atomic number. If these are considered mixtures, then many naturally occurring elements can be considered homogeneous mixtures. The element of lowest atomic number that has more than one stable isotope making up at least 5 % of the naturally occurring atoms is lithium, and the next lowest such element is boron. The next lowest such element is magnesium, which has three isotopes all satisfying this criterion. Titanium, with atomic number 22, has five such isotopes. Zinc, element 30, has five naturally occurring isotopes, three of which constitute more than 15 % each of the atoms in naturally occurring zinc. Germanium naturally contains five isotopes, each of which constitutes at least 5 % of the atoms, and 3 of these isotopes constitute at least 20 % of all the atoms each.
How does argon naturally occur?
Argon occurs as a result of the radioactive decay of 40K ( potassium 40 ) Potassium is common on Earth; about 1/60th of it's crust is potassium. Naturally occurring potassium is a mixture of three isotopes. Almost all of it is 39K and 41K, both of which are stable. About 1 atom in 10,000 is 40K, which is unstable. It has a very long half-life, >109 years; it decays to 40Ar which is stable.
