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Level 39

Covalent & Ionic Bonding


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protons - neutrons - electrons
Name the three types of particles that atoms are made of
nucleus
a proton is located in the _______ of an atom
protons and neutrons
What does the nucleus contains?
Positive
Anode (Electrolytic Cell)
Neutrons have a _______ charge
neutral - meaning they have no charge
Where are electrons located?
Electrons move around the nucleus in different energy levels called electron shells.
negative
at the beginning of a redox reaction, the charge of the anode is
What is the basis for chemical reactions?
Atoms can gain, lose or share electrons with other atoms.
Chemical Reaction
Matter is neither created nor destroyed in what type of reaction?
How are chemical bonds formed?
When outer electrons are attracted, shared, or moved from one atom to another in order to fill the outer electron shell.
Ionic Bond
a bond that results from electrostatic attraction between oppositely charged ions. The cation is positively charged, while the anion is negatively charged.
How do ionic bonds form?
When one element that wants one or more electrons to fill its outer electron shells is strong enough to take one or more electrons from another element.
an ion
When an atom gains or loses an electron it becomes an _______
either positive or negative
What type of charge does an ion have?
In covalent bonds the electrons are _______ between two atoms.
shared - which results in the outer shells of the two atoms overlapping
How do covalent bonds form?
When two or more elements want to fill their outer electron shell, but none of the elements are strong enough to "take" an electron from any of the other elements.
a molecule
Atoms that combine with one or more covalent bonds forms a _______
Water is a covalent bond between
two hydrogen atoms and one oxygen atom
covalent bonds
atoms share pairs of electrons
ionic bonds
form from the attraction of oppositely charged ions.
Covalent
Bonding Characteristic: Electrons are shared between 2 or 3 elements or compounds
Electron
A negatively charged subatomic particle located in the electron cloud outside the nucleus. It determines how atoms combine with other atoms.
ionic
<| 2.0+
fill outer electrons shells
Ionic and covalent bonds are alike in that they....
NaCl - table salt
What is a common compound formed by an ionic bond?