krystalgrivera12
Answered

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Write the symbol for every chemical element that has atomic number greater than 70 and atomic mass less than 181.2 u.

Sagot :

Answer:

Lu

Hf

Ta

Explanation:

Lu- Lutecium
Atomic Number- 71
Atomic Mass-174.967

Hf- Hafnium
Atomic Number-72
Atomic Mass178.492

Ta- Tantalum
Atomic Number-73
Atomic Mass-180.948

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