Windowed Mother 2018 Deduction if only Soc Security Income?

My mom gets my Dad's SS payments of $1300 per month , as he he died in 2017.  She did not file taxes in 2017 or 2018. If she files 2018, based on a 2018 Widower deduction of $24,000, would she get a refund of the difference between her Soc Security and the 24,000 standard deduction (24400 - 15,600)?