Multiple Choice
Which of the following statements best describes isotopes?
2. Atoms & Elements
Isotopes
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Which of the following answers give the correct number of subatomic particles for 
?
A
38 protons, 38 neutrons and 38 electrons
B
88 protons, 50 neutrons and 50 electrons
C
38 protons, 50 neutrons and 38 electrons
D
38 protons, 27 neutrons and 13 electrons
Verified step by step guidance1
Identify the element from the symbol 'Sr', which stands for Strontium.
The atomic number is given as 38, which indicates the number of protons in the nucleus of the atom. Therefore, Strontium has 38 protons.
The mass number is given as 88, which is the sum of protons and neutrons in the nucleus. Use the formula: Number of Neutrons = Mass Number - Atomic Number.
Calculate the number of neutrons: 88 (mass number) - 38 (atomic number) = 50 neutrons.
For a neutral atom, the number of electrons equals the number of protons. Therefore, Strontium has 38 electrons.
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