Lesson 2 Flashcards
The number of protons in an atom is equal to its ____
The number of protons in an atom is equal to its atomic number
As an atom is electrically neutral then the number of ____ must equal the number of ____
As an atom is electrically neutral then the number of electrons (negative) must equal the number of protons (positive)
The number of ____ in an atom is equal to (the calculation) ____
The number of neutrons in an atom is equal to (the calculation) mass number âž– atomic number
Where are the electrons?
In shells orbiting the nucleus
In what order do the electrons enter the shell
The electrons enter the shell closest to the nucleus first
What is the rule with filling shells
Each shell must be filled with its full quota before starting to fill the next shell
What is the maximum number of electrons that shell number one can take
Max 2 electrons
Where is shell number one
Closest to the nucleus
What max number do all shells take except number one shell
8
