Sr will always have 38 protons because that is its atomic number. Normally Sr has 38 protons and 49 neutrons yielding an atomic mass of 87. unless you are dealing with an isotope of Strontium in which 3 additional neutrons would give you the 53 neutrons in your answer, (38p, 52n).
Agreed with guy above thanks
The right answer for the question that is being asked and shown above is that: "The comma attempts to separate a compound subject." the comma used incorrectly in the sentence above is that <span>The comma attempts to separate a compound subject.</span>
Answer:
B
Explanation:
Entropy can be decreased only in the cases when liquid is converted to solid
Marie Curie in 1898
Hope this helps