Energy Levels Flashcards
A model that shows the placement of electrons around the nucleus of an atom or ion
Energy levels
Each level can hold a certain maximum number of electrons before it is considered full the rule is_____
Level 1 maximum 2
level 2 maximum 8
level 3 maximum 8
the rule is 288
All the elements in a group have the same electron configuration in their _____ shells
Outermost
Electrons in the outer shell that is not full are called _____
Valence electrons
_____have no valance electrons in their outer shell that is why they’re so stable and nonreactive
Noble gases (group 18)
Look at diagram practice for placement of electrons
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The period number that an element is in is the number of energy levels the element has for example:
for example: period 1 has 1 electron shell
any element is ______ so the number of protons equals the number of electrons
Neutral
An ______is an atom or group of atoms that has a positive or negative electric charge
Ion
The formation of an ion is called ______ and it is the result of an atom either gaining or losing electrons
Ionization
______are positively charged ions. They are formed when a metal atom loses valence electrons
Cations 🐱
______ are negatively charged ions. They are formed when a ______ accepts electrons into its outermost energy level
Anions 🐜
nonmetal atom
The ______says that atoms tend to gain, lose, or share electrons so as to have eight electrons in their outer electron shell
octet rule
Atoms gain or lose electrons so that they have the same number of electrons as the nearest ______
Noble gas
Some metal atoms, depending on the nature of the chemical reaction can form stable ions with ______
More than one charge
