Which of the following elements is the most reactive?

A. At

B. Cl

C. Br

D. I

How can you tell if it's reactive? What do you look at?

In this equation 2mg+o2=2mgo what is the subscript of the oxygen molecule

Draw the acetal produced when ethanol adds to ethanal.

Coal is transported from mine to plant via "unit trains" that usually consist of 100 cars each carrying 100 tons of coal. If one car carries exactly 80 tons of carbon (in the form of coal), calculate the number of kg-moles of carbon in the car.

Which set of quantum numbers is not permitted by the rules of quantum mechanics?

Question 2. Which of the following is a compound? a) Stainless steel b) Bronze c) Graphite d) Hydrogen sulphide

Where are alkaline earth metals found on the periodic table

IKI will turn deep purple in the presence of starch. Which term is applied to IKI in this situation? A. indicator B. litmus C. modifier D. product

How many electrons are in the 2p sublevel of nitrogen?

Which answer choice correctly lists the elements found in Period 2 of the periodic table? A. oxygen, fluorine, neon B. sodium, magnesium, aluminum C. nitrogen, phosphorus, arsenic D. beryllium, magnesium, calcium

Write the chemical formula for each compound described. a) barium chloride (1 Ba ion, 2 Cl ion)