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 =

1. 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:

Explanation:

1)

a)

Protons determine the element. Iron has 26 protons.

• Protons define the element.
• Iron's atomic number is 26 (26 protons).

Since the number of protons (26) matches iron's atomic number, Braden is correct.

Answer:

Yes

b)