Which of these elements has two valence electrons? A. hydrogen B. barium C. nitrogen D. krypton E. bromine

What does it mean that gold has a specific heat capacity of 0.135 J/g*C

In reaction a, each sodium atom gives one electron to a chlorine atom in reaction be an isotope of oxygen decays to form an isotope of nitrogen. Which statement best describes the energy that is released per gram by these reactions

What do Lewis dot structures show?

What are the most common petrochemical products and their uses?

In term of molecules explain what happen to a sugar cube when it is placed into a beaker of water

Read the following passage: The movement of tectonic plates buries a rock deep inside Earth. Intense heat and pressure change the mineral composition of the rock and transform it into Rock A.

What is a change which forms one or more new substances?

Which changes occur as a cadmium atom, Cd, becomes a cadmium ion, Cd2+? (1) The Cd atom gains two electrons and its radius decreases. (2) The Cd atom gains two electrons and its radius increases.

Explain Charles law

2 H2 + O2 → 2 H2O What is the product of this chemical reaction