One US ton will be equal to 907.185 kg and 1kg will be equal to 10^6mg.
<span>mass percentage of estrone= </span>estrone mass/<span>tissue mass * 100%
</span>mass percentage of estrone= 13mg/ (6 tons * 907.185 kg /ton * 10^6mg/kg) * 100%
mass percentage of estrone=0.238 *

%
Answer:
-the number of outer electrons
Explanation:
Outer electrons are referred to as valence electrons and they are typically what determines the property of an elements such as their reactivity.
For eg, Na (sodium) has 1 valence electron and it really wants to give it aways so it can return back to octet rule (having 8 electrons in outershell) to become stable. So when you put sodium in water (you can watch videos of it) it literally blows because of high reactivity.
Answer:
Explanation:
Energy of falling radiation having wavelength of 265 nm
= h c / λ where h is plank's constant , c is velocity of light and λ is wavelength of radiation . Putting the values
Energy of light photon = 6.6 x 10⁻³⁴ x 3 x 10⁸ / 265 x 10⁻⁹
= .0747 x 10⁻¹⁷
= 7.47 x 10⁻¹⁹ J .
Work function of sodium is 4.41 x 10⁻¹⁹
So kinetic energy of ejected electron = energy of falling photon - work function
= 7.47 x 10⁻¹⁹ - 4.41 x 10⁻¹⁹
= 3.06 x 10⁻¹⁹ eV .
The answers are very vague but basically the nonmetal group would be anything but the middle —
So the nonmetals would be the first , second group and then the last group, second to last group, all the way until you see B for Boron. Anything in the middle of the periodic table is a metal. So I would say along the top but to note, there are particular elements in group that aren’t along the top of the periodic table that would be considered a nonmetal!
I hope this helps you and if you are still confused let me know! :)