Biology Chapter 2 Test Review

What are added to get the mass number of an atom?

How do you write the isotope of an atom?

What is an isotope?

What is the atomic number of an atom?

What is a compound?

What atoms make up a molecule of water?

What are some characteristics of chlorine?

• Poisonous

• greenish gas

• combines with sodium to form table salt

• used in battles in WWI

What type of bond involves sharing electrons?

What type of bond forms molecules?

What are valence electrons?