Elements
What two elements make up water?
Hydrogen and Oxygen
What are the 3 types of bonds?
Covalent, Ionic and Metallic bonds
How many electrons usually are there in the outer shell of an atom?
8
What is a chemical reaction?
A change in matter that produces new substances with new properties.
What is the name of the only element does not need 8 electrons in its outer shell to become stable?
Hydrogen - it can only hold 2 electrons
What is a covalent bond?
Chemical bond that involves the sharing of electron pairs between atoms.
Atoms that gain an electron become _______ charged.
Negatively
Which type of atom is more likely to have a chemical bond, an atom with 8 electrons in its outer shell or an atom with 1 electron?
An atom with 1 electron because an atom with 8 electrons is already stable. An atom with 1 electron needs to bond with another atom in order to fill its outer shell.
What is the name for this chemical formula?
NaCl
Sodium Chloride
What is an ionic bond?
Chemical bond between metals and non-metals through the transfer of electrons
Atoms that lose an electron become ________ charged.
Positively
Metallic bond
How many different elements are in the glucose formula C₆H₁₂O₆?
a) 6
b) 3
c) 24
d) 12
3
Ionic bonds form between what classes of elements?
Metals and Non-metals
Can two positive ions be attracted to each other? Why or why not?
No, because ions are only attracted to the opposite charge.
What kind of bond is H₂O?
a) Covalent
b) Ionic
c) Metallic
Covalent bond
What is the name of this element that is commonly found in bananas?
K
Potassium
What class of elements does a covalent bond form between?
Nonmetals
How many electrons are there usually in the first shell of an atom?
2
What is the octet rule?
Rule that says atoms will lose, gain or share electrons in order to have 8 electrons in its outer shell.