In which list are the elements arranged in order of increasing atomic mass? (1) cl, k, ar (3) te, i, xe(2) fe, co, ni (4) ne, f, na
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Ответ:
1.Cl K Ar is in order
2.Fe Co Ni isn't in order
3.Te I Xe isn't in order
4.Ne F Na isn't in order
Ответ:
Explanation:
1. Virus's are hard to detect because of their simple construction.
2. Some mutate very easily.
3. It is hard to isolate the virus and kill it without doing damage to the host.