Which element is a metal that is in the liquid phase at STP?

(1) bromine (3) hydrogen

(2) cobalt (4) mercury

Write and label the density triangle

What is the molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide

Which of the following is not a skill scientist use to learn about the world A. Predicting B. Observing C. Inferring D. Scientist use all of the above skills

The atomic number also represent the amount of

What is 5.06 grams of oxygen in atoms

What is represented in an electron dot diagram

In a first order reaction, what fraction of the reactant will remain after 4 half-lives?

Which trends are observed when the elements in Period 3 on the Periodic Table are considered in order of increasing atomic number? (1) The atomic radius decreases, and the first ionization energy generally increases.

The enthalpy of formation of MX is ΔHf° = - 525 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 139 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = - 313 kJ/mol. (Refer to the hint).

Which group of elements could you not use in making fireworks?