객관식
Which element is represented by an atom that has 9 protons and 10 neutrons?
121
views
4. Atoms and Elements
Isotopes
Multiple Choice
An atom has 14 protons and 15 neutrons. Which element is it (and what is the isotope’s mass number)?
A
Silicon, mass number
B
Silicon, mass number
C
Aluminum, mass number
D
Phosphorus, mass number
검증된 단계별 안내1
Identify the number of protons in the atom, which determines the element's atomic number. Here, the atom has 14 protons.
Use the atomic number (number of protons) to find the element on the periodic table. The element with atomic number 14 is Silicon (Si).
Determine the number of neutrons given, which is 15 in this case.
Calculate the isotope's mass number by adding the number of protons and neutrons: \(\text{mass number} = \text{protons} + \text{neutrons} = 14 + 15\).
Combine the element name and the mass number to identify the isotope, for example, Silicon-29.
Related Videos
Related Practice
