3.Write the symbol of the element that has a charge of +1 when it has 71 electrons.
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Ответ:
The symbol :
Further explanationThere are two components that accompany an element, the mass number and atomic number
Atoms are composed of 3 types of basic particles (subatomic particles): protons, electrons, and neutrons
The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.
Atomic number = number of protons = number of electrons ⇒ neutral number
Atomic mass is the sum of protons and neutrons
Atomic Number (Z) = Atomic mass (A) - Number of Neutrons
The element has 71 electrons and a charge of +1 , so
Number of protons = 71 + 1 = 72
Number of protons = the atomic number = 72
The element with atomic number 72 is Hafnium(Hf)
The atomic mass of Hf = 178 g/mol
Ответ:
The correct answer is Group 13. {According to quizlet and edge nuity}. Sorry, someone deleted my answer, and I don't remember the old answer that I wrote. The answer is Group 13.
Explanation: