Write the symbol for every chemical element that has atomic number less than 75 and atomic mass greater than 173.5 u.

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26-04-2018
Chemistry

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Write the symbol for every chemical element that has atomic number less than 75 and atomic mass greater than 173.5 u.

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Following are the chemical elements that have atomic mass greater than 173.5 u and atomic number less than 75.

1. Lutetium
Atomic Number = 71
Atomic Mass = 174.97 u

2. Hafnium
Atomic Number = 72
Atomic Mass = 178.49 u

3. Tantalum
Atomic Number = 73
Atomic Mass = 180.95 u

4. Tungsten
Atomic Number = 74
Atomic Mass = 183.85 u