Question

Isotopes

Answer 1

are two phosphorus isotopes.Which of the following statements below is true?

Answer 2

A 31 P 15 atom has fewer electrons than 32 P 15 atom.
B 32 P 15 has 15 protons and 16 neutrons.
C 31 P 15 has 15 protons and 31 neutrons.
D 31 P 15 and 32 P 15 have the same physical properties.
@UnkleRhaukus

Answer 3

The notation for an isotope of element \(E\) of atomic number \(Z\),
with \(N\) neutrons. And hence \(A = Z+N\) nucleons is;
\[^{A}_{Z}{\text E}\]___________

You have phosphorus; which always has 15 protons;
the two isotopes you have are:
\[^{31}_{15}{\text P},\quad ^{32}_{15}{\text P}\]

Answer 4

How many neutrons does each species have?

\[A=Z+N\\
N=A-Z\]

\[Z=15\]

for P-31, A=31
for P-32, A=32

Answer 5

for phosphorus-31
the number of neutrons is
N = 31 -15 = 16

for phosphorus-32
the number of neutrons is
N = 32 -15 = 17

Answer 6

An uncharged atom, has the same number of electrons as protons, and phosphorus always has 15 protons .

Answer 7

Did you type those options out exactly right? because none of them are right

Answer 8

let me check first

Answer 9

yup,i type it correctly

Answer 10

A: 31 P 15 atom has fewer electrons than 32 P 15 atom.

cannot be correct, because both atoms will have the same number of electrons : 15

Answer 11

it can be B if the neutrons is 17

Answer 12

Anyway,thnx @UnkleRhaukus
maybe it could be printing error in the book

Answer 13

B: 32 P 15 has 15 protons and 16 neutrons.

this cannot be correct, because 15+16 = 31 (not 32)

Answer 14

C: 31 P 15 has 15 protons and 31 neutrons.

this is not correct because 15 + 31 = 46 (not 31)


[C': 31 P 15 has 15 protons and 31 nucleons. (would be correct)]

Answer 15

D: 31 P 15 and 32 P 15 have the same physical properties.

is not correct because P-32, has one more neutron than P-31, therefore is is slightly heavier and will have sightly different properties

[D': 31 P 15 and 32 P 15 have the same chemical properties. (would be correct)]

Answer 16

Thnx @UnkleRhaukus :D

Answer 17

[A': 31 P 15 atom has equal electrons to 32 P 15 atom. (would be correct)]
[A'': 31 P 15 atom has fewer neutrons than 32 P 15 atom. (would be correct)]

[B': 32 P 15 has 15 protons and 17 neutrons. (would be correct)]
[B'': 31 P 15 has 15 protons and 16 neutrons. (would be correct)]