Chemistry
Chemistry, 27.07.2019 16:00, cece4649

In the symbol 42he, the subscript 2 is the for helium and the superscript 4 is the for helium.

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Biology, 04.07.2019 09:30, joej0778
The half-life of a radioisotope is the amon the symbol 42he, the subscript 2 is the for helium and the superscript 4 is the for helium. unt of time it takes for
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Chemistry, 17.07.2019 03:50, Chatoloko231
In the symbol 42he, the subscript 2 is the for helium and the superscript 4 is the for helium. question 10 options: atomic mass; atomic number atomic number; atomic mass mass number; atomic number atomic number; mass number
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Chemistry, 28.07.2019 05:30, fun1togo
In the symbol he, the superscript 4 is the for helium, and the subscript 2 is the for helium. it is not atomic mass and atomic : (
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Chemistry, 28.07.2019 05:30, QueenNerdy889
In the symbol he, the superscript 4 is the for helium, and the subscript 2 is the for helium.all of the answers i've looked up have been wrong. i believe i've found the answer. look on page 293 of your textbooks.the textbook says,  "the common symbol for an alpha particle is 4/2 he. the subscript is the atomic number (the number of protons). the super- script is the mass number (the sum of the numbers of protons and neutrons)."therefore the answer should be: super-script 4 is the mass number, subscript  2 is the atomic number 
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In the symbol 42he, the subscript 2 is the for helium and the superscript 4 is the for helium....

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