part 1: answer the following questions for an isotope with these features: (82 pts)
26 protons unknown electrons 28 neutrons
1) the element: braden claims that, this isotope is a version of iron.
(a) at first glance, do you agree or disagree with braden? yes or no
b) evidence: what relevant information do you know? (5pts each)
from your evidence sheet (2 facts for full credit):
features of this isotope of interest:
c) reasoning: why is braden right or wrong? (6 pts)
braden is correct/incorrect (circle one) because

d) what is the correct chemical symbol of our isotope of interest? (3 pts)
x =
2) charge: steven claims, if this isotope had 23 electrons, the net charge (q) would be -3.
(a) at first glance, do you agree or disagree with steven? yes or no
b) evidence: what relevant information do you know? (5 pts each)
from your evidence sheet (2 facts for full credit):
features of this isotope of interest:

Question

part 1: answer the following questions for an isotope with these features: (82 pts)
26 protons unknown electrons 28 neutrons
1) the element: braden claims that, this isotope is a version of iron.
(a) at first glance, do you agree or disagree with braden? yes or no
b) evidence: what relevant information do you know? (5pts each)
from your evidence sheet (2 facts for full credit):
features of this isotope of interest:
c) reasoning: why is braden right or wrong? (6 pts)
braden is correct/incorrect (circle one) because

d) what is the correct chemical symbol of our isotope of interest? (3 pts)
x =
2) charge: steven claims, if this isotope had 23 electrons, the net charge (q) would be -3.
(a) at first glance, do you agree or disagree with steven? yes or no
b) evidence: what relevant information do you know? (5 pts each)
from your evidence sheet (2 facts for full credit):
features of this isotope of interest:

Accepted Answer

# Brief Explanations:
1.
    - a) **Yes**: The atomic number of an element is determined by the number of protons. Iron (Fe) has an atomic number of 26, which matches the number of protons in this isotope.
    - b) **Evidence from 'Evidence Sheet'**: Protons determine the atomic number/element; Iron has 26 protons. **Features of the isotope**: 26 protons (matches iron's atomic number).
    - c) **Correct**: Because the number of protons (26) is equal to iron's atomic number.
    - d) **Chemical Symbol**: Fe (as iron's chemical symbol is Fe).
2.
    - a) **No**: The net charge of an ion is calculated as $q = p - e$, where $p$ is the number of protons and $e$ is the number of electrons. Here, $p = 26$ and $e = 23$, so $q=26 - 23=+ 3$, not $-3$.
    - b) **Evidence from 'Evidence Sheet'**: Net charge formula $q=p - e$; Protons are positively charged, electrons are negatively charged. **Features of the isotope**: 26 protons, 23 electrons.

# Answer:
1.
    - a) Yes
    - b) Protons determine the atomic number/element; Iron has 26 protons. Features: 26 protons.
    - c) Correct because the number of protons (26) is equal to iron's atomic number.
    - d) Fe
2.
    - a) No
    - b) Net charge formula $q = p - e$; Protons are positively charged, electrons are negatively charged. Features: 26 protons, 23 electrons.

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