Which of the following elements is a gas at room temperature?

fluorine (F)

sulfur (S)

mercury (Hg)

iodine (I)

Maximum potential energy of electron in an atom?

Ionization energy is a measure of the ability of atoms to attract electrons within a bond. True False

When you mix copper sulphate solution and steel wool, what is the chemical property that can be observed.

Which of the following is a chemical change? breaking a pencil freezing water rusting of an iron nail liquid nitrogen becoming a gas

What is electrostatic attraction?

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of water?

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.