The first pesticides relied on natural chemicals, such as those taken from chrysanthemum flowers is true
The average atomic mass of the imaginary element : 47.255 amu
<h3>Further explanation </h3>
The elements in nature have several types of isotopes
Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
Mass atom X = mass isotope 1 . % + mass isotope 2.% ..
isotope E-47 47.011 amu, 87.34%
isotope E-48 48.008 amu, 6.895
isotope E-49 50.009 amu, 5.77%
The average atomic mass :

Answer:
The correct answer is Density
Explanation:
Hope this helps you
Explanation:
<h3>Electrical energy into heat energy..</h3>
<h2>hope it helps.</h2><h2>stay safe healthy and happy...</h2>