Write a thermodynamic equation for

a) the first ionisation energy for fluorine

b) the second ionisation energy of magnesium

Which substance has Hf defined as 0 kJ/mol? H2O (s) Ne (l) O2 (g) CO2 (g)

Metallic crystals are excellent conductors of electricity due to the existence of positive and negative ions. TRUE FALSE

Whose atomic model could be described as a positive, solid sphere in which electrons are disbursed? A) Rutherford B) Dalton C) Thomson D) Mendeleev.

What is the solubility of PbI2 in 0.4 M KI given the solubility constant of PbI2 is 7.1 x 10-9?

In this redox reaction, identify the reducing agent. 2Li + F2 2LiF

Which of the following is an example of the electrostatic force acting in a atom a. a neutron attracting a electron b. a neutron attracting a proton c. an electron attracting another electron d. a proton attracting an electron

When does water move between the surface of earth and the atmosphere

Why does water vapor exist naturally in the atmosphere

How is the volume of a gas related to its concentration of particles? As the volume of a contained gas expands, its pressure concentration of particles will increase.

How does the density of one penny compare with the density of two pennies