Hi !
<em>EXCEPT :</em>
- that nicotine in cigarette smoke binds to hemoglobin and reduces the amount of oxygen delivered to fetal tissues.
<em>carbon monoxide</em> in cigarette smoke binds to hemoglobin and reduces the amount of oxygen delivered to fetal tissues.
The elements are substances that cannot be broken down into other matter by chemical means, and an atom is the fundamental particle in an element. As of 2001, there were 112 known elements, 88 of which occur in nature; the rest were created in laboratories. Due to their high levels of radioactivity, they exist only for extremely short periods of time. Whatever the number of elements—and obviously that number will increase over time, as new elements are synthesized—the same number of basic atomic structures exists in the universe.
Read more: http://www.scienceclarified.com/everyday/Real-Life-Chemistry-Vol-1/Isotopes-How-it-works.html#ixzz4S...
<span>Personal
protective equipment is unnecessary when providing first aid.
-false
</span>
A pencil? Computer? Unfinished?
