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Science Ch 6 Section 2 notes
notes
14
Science
8th Grade
02/20/2013

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Term
Atoms form bonds with other atoms using what in their outer energy levels?
Definition
electrons
Term
What are the four ways to form bonds with other atoms using electrons?
Definition
1. by losing electrons
2. by gaining electrons
3. by pooling electrons
4. by sharing electrons with another element
Term
By losing an electron, what changes?
Definition
the balance of the electric charges change
Term
What is an atom that is no longer neutral because it has lost or gained an electron?
Definition
ion
Term
What two ions are strongly attracted to eachother?
Definition
postitive sodium and negative chloride
Term
Some atoms, such as oxygen, need to gain how many electrons to acheive stability?
Definition
2
Term
when dod metallic bonds form?
Definition
when metal atoms share their pooled electrons. This bonding affects the properties of metals
Term
What is the neutral particl that is formed when atoms share electrons?
Definition
molecule
Term
What is the basic unit of a molecular compound?
Definition
a molecule
Term
What is another way an atom can form a covalent bond?
Definition
by sharing two or more electrons
Term
What is it called when two pairs of electrons are shared by two atoms?
Definition
double bond
Term
What is a bond in which electrons are shared unevenly?
Definition
polar bond
Term
What is a combination of chemical symbols and numbers that show hwich elements are present in a compound and how many atoms of each are present?
Definition
a chemical formula
Term
When no subscript is shown, what is the understood number of atoms?
Definition
1
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