The number of protons always equals the number of neutrons in all isotopes.
B.
The number of protons never equals the number of neutrons in an isotope.
C.
Different isotopes for the same element will always have the same numbers of neutrons.
D.
Different isotopes for the same element always have the same number of protons.
Answer:
D. different isotopes for the same element will always have the same numbers of neutrons.
Explanation:
An isotope is the different variant of an element that has different number of neutron. There are various elements found in nature that have different isotopes.
Number of neutrons present in atom is different for the same element which makes the mass of one isotope different from the another.
Example of such isotope : Isotope of hydrogen are Protium, Deuterium and Tritium.
Different isotopes for the same element will always have the same numbers of neutrons.
The correct statement about isotopes is C. Different isotopes for the same element will always have the same numbers of neutrons. Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. The number of protons in an element determines its atomic number, whereas the sum of protons and neutrons determines its atomic mass. So, while isotopes of the same element have the same number of protons, they can have different numbers of neutrons.
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Acceleration = (change in speed) / (time for the change)
change in speed = (ending speed) - (starting speed)
change in speed = (10 m/s) - (2 m/s) = 8 m/s
Acceleration = (8 m/s) / (4 sec)
Acceleration = (8/4) (m/s²)
Acceleration = 2 m/s²