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Klio2033 [76]
2 years ago
8

Which of the following statements about the mass of an object is correct

Chemistry
1 answer:
Solnce55 [7]2 years ago
3 0

Answer: Mass remains constant

Explanation:

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Two valence electrons means that atom is from 2. group of periodic table, only beryllium is from that group; sodium (1. group), boron (13. group) and carbon (14. group).

Beryllium-10 has 6 neutrons, so it is isotope (different number of neutrons or mass number).

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