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The atomic number of the elements A , X, T, R and Q are 16, 23 , 27, 46 and 82 respectively. Without referring to periodic table 

a)Write the electronic structure of A, X, T, R and Q

b) To which group of periodic table does element A belong ?

c)To which period of the periodic table does R belong ?

d) Which of the elements are noble gases ?

e) Which of the elements is diamagnetic?

f) Which of the elements belong to f− block?

Which two statements express themes of poem?

Find 80%, 85% and 99.9% confidence interval for the sample mean of a population, if we know that in a random sample of 70 people from the population, the sample mean is 60 and the standard deviation is 5

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What is tax?

Hello could someone help me with this question:

1. In 2020 there was a world pandemic. The World Health Organization advised countries to follow social distancing. Public health records indicate that t weeks after the outbreak of COVID-19, approximately Q(t)=   thousand people had caught the disease.