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How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
How many elements are naturally occuring?
Elements 1-92 except 43 (technetium) and 61 (promethium) occur naturally. So, there are 90 naturally occurring elements.
How many number of elements found in naturally in the universe?
Today all elements up to atomic number 98 (including Cf) are considered as natural chemical elements.
How many elements have been found to occur in nature?
There are currently 118 elements, ranging from #1 Hydrogen to #118 Ununoctium. Many of the transuranium elements (#93-#118) are synthetic, meaning that the only place they have been found is in a laboratory, thus do not exist in nature. Technetium (#43) and Promethium (#61) are also synthetic.
Which metals are not a pure element?
Any alloy is not a pure element. Common alloys include brass, bronze, steel, the "nickel" used in nickels (which is actually mostly copper), sterling silver, and "gold" less than 24 karat. Really it's easier to figure out which ones ARE pure elements: if it's listed on the periodic table, then it's a pure element, otherwise it isn't.
What do elements number 43 61 and 93 to 112 have in common?
Elements 43, 61, and 93 to 112 belong to the actinide and transactinide series in the periodic table. These elements are located in the f-block and are characterized by the presence of electrons in the f-orbitals, making them part of the inner transition metals. They are predominantly radioactive and are commonly used in nuclear reactions and research.
What percent of 61 is 43?
43/61*100=70.49 Thank you
What are the common factors of 12 16 26 43 and 61?
There is only one and it is 1
What group on the periodic table are synthetic elments?
Technetium (43), Promethium (61), and all the transuranic elements are synthetic.
How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
Which are the naturally occurring elements?
Everything in the Periodic Table up to Uranium (92). Wrong, not everything, the elements Technetium (43) and Promethium (61) do not occur naturally.
What is 2623 divided by 61?
43
What is 61 percent out of 43?
The way to find 61 percent of 43 is to multiply 63 by 43. But first you must change 61 percent into a decimal. You do this by understanding that 61% is 61/100 or .61. Then .61x43 is 26.23.In general any percent can be changed to a decimal by moving the decimal place to the left two places. To think of 61 and 61.0 and moving the decimal two places is .61.
What is 2623 divided by 43?
61
How many elements occur natural?
Elements 1-92 except 43 (technetium) and 61 (promethium) occur naturally. So, there are 90 naturally occurring elements.
How many week are in 43 days?
43 days = 43/7 = 61/7 weeks
What is 43 over 7 as a mixed number?
43/7 = 61/7
