1. Which set describes an atom of 60Ni? (A) 32 electrons, 32 neutrons, and 28 pr
ID: 698970 • Letter: 1
Question
1. Which set describes an atom of 60Ni? (A) 32 electrons, 32 neutrons, and 28 protons (B) 30 electrons, 30 neutrons, and 30 protons (C) 28 electrons, 32 neutrons, and 28 protons (D) 28 electrons, 30 neutrons, and 28 protons 2. Bromine has two naturally occurring isotopes: "Br (50.69%) and 81Br (49.31%). Ifthe massof"Bris determined to be 78.92 amu, what is the mass of 3 'Br? (A) 79.90 amu (C) 80.91 amu (B) 80.85 amu (D) 81.00 amu 3. The equation below represents what nuclear process? 234 90 He (B) beta decay (D) positron decay (A) alpha decay (C) gamma decay Which electronic transition in a hydrogen atom produ 4. light with the highest frequency? (B) n-4n=1 (A) n=5 n-3 (C) n=3 n=5 (D) n=1 n=4
Explanation / Answer
1. The atomic number of Ni is 28.
So, the number of protons in Ni is 28.
The mass number is given as 60.
Neutrons = mass number - atomic number
= 60 - 28
= 32
Protons = electrons
So, number of electrons = 28
Hence, answer is option C.
As per chegg guidelines, first question is answered.
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