In understanding Isotopes, which of the following best describes an isotope?

SUMMATIVE TEST

Quiz
•
Science
•
12th Grade
•
Medium
Diether Urbano
Used 32+ times
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40 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An atom with the same number of electrons but a different number of protons.
An atom with the same number of protons but a different number of neutrons.
An atom with different numbers of protons and neutrons.
An atom with the same number of neutrons but a different number of electrons.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Radioisotopes play a significant role in the medical field. Which of the following is a typical use of radioisotopes?
Conducting chemical reactions.
Building molecular structures.
Treating thyroid diseases.
Coloring compounds.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Isotopes and isobars are distinct in their atomic configurations. Based on this, how do isotopes and isobars differ?
Isotopes have the same number of protons but different numbers of neutrons; isobars have the same mass number but different atomic numbers.
Isotopes have different numbers of protons; isobars have the same number of neutrons.
Isotopes are artificially produced; isobars are naturally occurring.
Isotopes and isobars are identical in all properties.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Accuracy and precision are essential for trustworthy measurements in chemistry. Why are accuracy and precision important in chemical measurements?
They ensure that the measurements are repeatable.
They help in reducing the number of experiments.
They ensure the reliability and validity of experimental results.
They allow for the use of fewer materials in experiments.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In carbon dating why is carbon-14 more effective than carbon-12?
Carbon-12 is too abundant for precise measurements.
Carbon-14 is radioactive and decays over time, allowing for age estimation.
Carbon-12 is unstable and decays too quickly.
Carbon-14 is easier to detect in organic materials.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Percent yield indicates the efficiency of a reaction. If you expected to produce 10.0 grams but only got 8.5 grams, what is the percent yield?
85%
75%
90%
95%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Accuracy and precision are critical for reliable measurements. Given the measurements: 74.8 g, 74.9 g, and 75.1 g, which of the following is correct?
The measurements are accurate but not precise.
The measurements are precise but not accurate.
The measurements are both accurate and precise.
The measurements are neither accurate nor precise.
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