The two possible valences of the element Iron are

A planetary electron is also known as a valence electron. 

In which of the following bonds are electrons shared?

Name the compound N2O4. 

Bronze is an example of a(n) ________.

All of the following are true regarding organic compounds EXCEPT

H2S is named ________. 

In the equation 2H2(g) + O2(g) → 2H2O(l)  O2(g) is a ______ in the reaction. 

The element Be has:  atomic number: 4 atomic mass: 9 Identify the correct number of protons, electrons, neutrons, and valence for this element . 

Atoms of the same element that have a different number of neutrons are called _______.