What would happen if atoms are combined together?
Substances are formed.
What is chemical bonding?
The combining of atoms to form molecules or ionic compounds.
What is the difference betweem the new substances that are formed after chemical bondings and the original elements?
Their properties are different.
What happens to the electrons when chemical bonds are formed?
Electrons are shared, gained, or lost.
What is a chemical bond?
An interaction that holds atoms or ions together.
How many electrons can the first energy level of an atom hold?
How many electrons can the second enery level of an atom hold?
From what could you determine the number of electrons in an atom?
The atomic number of the element.
Which group of elements do not usually form bonds?
Noble gases [Group 18].
What do elements in the same group have in common?
Number of their valence electrons.