Question

18 how many neutrons are in the tungstan - 185 isotope? (0.5 points) enter your answer 19 how many electrons are in the sulfur ion? (0.5 points) enter your answer

Explanation:

Step1: Recall tungsten's atomic number

The atomic number of tungsten (W) is 74.

Step2: Use neutron - mass number relationship

The number of neutrons $n$ is calculated by subtracting the atomic number $Z$ from the mass number $A$. For tungsten - 185, $A = 185$ and $Z=74$. So $n=A - Z$.
$n=185 - 74$
$n = 111$

Step3: Recall sulfur's atomic number

The atomic number of sulfur (S) is 16.

Step4: Consider common sulfur ion charge

A common sulfur ion is $S^{2 - }$. It gains 2 electrons. So the number of electrons in $S^{2 - }$ is the atomic number plus 2.
Number of electrons $=16 + 2=18$

Answer:

18: 111
19: 18