An isotope refers to two or more forms of a specific element that has the same number of protons but an unequal number of neutrons. Moreover, if the element is neutral, the number of protons is equal to the number of electrons. For this question, the atomic structures of Li-6 and Li-7 b<span>oth have 3 protons and 3 electrons, but Li-7 has 4 neutrons. </span>
Mr. Schultz should enroll in a Part D plan before he has a 63-day break in coverage in order to avoid a premium penalty.
I think C because to not get lightheaded, you need blood to go to your brain and if you're exercising and you feel light headed or dizzy, you wouldn't be able to exercise!. So from my understanding, the answer would be C but I am not 100% Hope this helps! :)
Less water-soluble substances will reach the deeper part of respiratory system. That means a substance which more water-soluble(ammonia, formaldehyde, hydrogen chloride) will only damage upper respiratory systems like trachea or bronchus.
High water soluble substance also more irritating.