Answer:
Mass number
Explanation:
Isotopes have the same number of protons and electrons but different no. Of neutrons. As mass number = protons +neutrons.
Mass number should differ.
Have a blessed day
Please mark as brainliest if possible
Answer:
never give up its an order if you do then so dose life
Explanation:
never give up
<span>for accurate results, for example when they are making vaccines, these are weakened harmful or disease causing viruses,, too little of the virus then it would not be a vaccine or simply would not build you antibodies, and too much of it would not also not a vaccine since it will already inflict a disease or possibly be fatal</span>
Composition is what it's made of vs texture being what the substance feels like.
