T
he modern periodic table has.
horizontal rows which are called
as
The age of rocks and fossils can be determined with the help of
isotopes.
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This activity on determining age of rocks and fossils is intended for 8th or 9th ... This activity will help students to have a better understanding of the basic ... (called isotopes) with unstable atomic nuclei that have a tendency to change, or decay. ... pieces of parent isotope remain, and the first row of the decay table (Figure 2) ...
Missing: periodic horizontal
Explanation:
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