Atoms and Elements Flashcards
Where is the nucleus in an atom?
IN THE MIDDLE
What does the nucleus contain?
PROTONS AND NEUTRONS
What charge do protons have?
+ve POSTIVE
What charge do neutrons have?
NO CHARGE (NEUTRAL)
What charge does a nucleus have overall and why?
POSITIVE BECAUSE THE NUCLEUS CONTAINS PROTONS AND NEUTRONS AND NEUTRONS HAVE NO CHARGE LEAVING THE POSITIVE CHARGE ONLY
What charge do electrons have?
-ve NEGATIVE
What do electrons occupy?
SHELLS AROUND THE NUCLEUS
What do the number of protons equal?
THE NUMBER OF ELECTRONS
Do atoms have an overall charge?
NO, BECAUSE THE CHARGES ON THE PROTONS AND ELECTRONS ARE THE SAME SIZE SO THEY CANCEL EACH OTHER OUT
If some electrons are added and removed, the atom becomes charged and then becomes a what?
AN ION
If a substance contains only one type of atom, what is it called?
AN ELEMENT
What do atoms have?
A SMALL NUCLEUS SURROUNDED BY ELECTRONS
