The atomic mass and atomic number of lead are 208 and 82 . The atomic mass and atomic number of bismuth are 209 and 83 . The neutron/proton ratio in an atom

Question

The atomic mass and atomic number of lead are 208 and 82 . The atomic mass and atomic number of bismuth are 209 and 83 . The neutron/proton ratio in an atom (A) Is higher in lead than in bismuth (B) Is lower in lead than in bismuth (C) Is equal in both lead and bismuth (D) None

Tardigrade Admin · Accepted Answer

82 Pb 208 ; p=82 ; n=208-82=126 83 Bi 209 ; p=83 ; n=209-83=126 n / p for Pb =(126/82)=1.53 n / p for Bi =(126/83)=1.51 ∴ (n/p) for Pb >( n / p ) for Bi

Q. The atomic mass and atomic number of lead are $208$ and $82$ . The atomic mass and atomic number of bismuth are $209$ and $83$ . The neutron/proton ratio in an atom

Is higher in lead than in bismuth

Is lower in lead than in bismuth

Is equal in both lead and bismuth

None

$_{82} P b^{208}; p = 82; n = 208 - 82 = 126$
$_{83} B i^{209}; p = 83; n = 209 - 83 = 126$
$n / p$ for $P b = \frac{126}{82} = 1.53$
$n / p$ for $B i = \frac{126}{83} = 1.51$
$∴ \frac{n}{p}$ for $P b > \frac{n}{p}$ for $B i$

Q. The atomic mass and atomic number of lead are 208 and 82 . The atomic mass and atomic number of bismuth are 209 and 83 . The neutron/proton ratio in an atom