D seems to be the correct answer
Answer:
no
Explanation:
they need the same amount of protons to be the same element (i apologize if I am wrong)
True or false question? if so, true
Answer: Income effect refers to the change in an income earned by an individual and with a percentage change upward or downward impacts consumer buying/ purchasing power of it
Explanation: You didn't put the answer choices so ii couldn't tell you exactly which one.