Scelta multipla
Which property of argon makes it useful for potassium-argon dating?
161
views
2. Atoms & Elements
Isotopes
Scelta multipla
What is the name of the silicon isotope that has 15 neutrons?
A
Silicon-28
B
Silicon-31
C
Silicon-30
D
Silicon-29
Guida verificata passo dopo passo1
Identify the atomic number of silicon, which is the number of protons. Silicon has an atomic number of 14, meaning it has 14 protons.
Recall that the mass number of an isotope is the sum of protons and neutrons: \(\text{Mass number} = \text{Number of protons} + \text{Number of neutrons}\).
Given the number of neutrons is 15, calculate the mass number: \(14 + 15 = 29\).
Name the isotope by combining the element name with the mass number, resulting in Silicon-29.
Verify that Silicon-29 corresponds to the isotope with 15 neutrons, confirming the correct answer.
Video correlati
Pratica correlata
