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What is the atomic mass of an atom with 9 protons 11 neutrons and 9 electrons
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What is the atomic mass of an atom with 9 protons 11 neutrons and 9 electrons

User Djordje Ivanovic
by
8.1k points

1 Answer

1 vote

Answer:

20 amu.

Step-by-step explanation:

Atomic mass = protons + neutrons

= 9 + 11

= 20 amu

The atomic number = number of protons in it= 9.

User Amucunguzi
by
8.2k points
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