Periodic Table
The number of electrons in the lowest energy level
What is 2 electrons?
The number of dots around Sodium?
What is one?
Sodium loses an electron
What is Na+?
When an electron is attracted to the nuclei of two atoms at the same time
What is a covalent bond?
the combination of chemical symbols and possibly numbers
What is the chemical formula?
The group that has two valence electrons?
What is group 2, the alkaline earth metals?
the structure for lithium oxide
What is 2 [Li]+and [O]2-, with 8 electrons around the oxygen?
Chlorine gains an electron
What is Cl-?
the overall charge of a particle that is covalently bonded
What is neutral?
The chemical formula for 2 atoms of carbon and 4 atoms of hydrogen
What is C2H4?
The group that has a full outer shell
What are the noble gases, group 18?
the structure for aluminum sulfide
What is 2[Al]3+ and 3[S]2-, with 8 electrons around each sulfur?
The attraction between a positive ion and a negative ion
What is an ionic bond?
The particle formed when atoms share electrons
What is a molecule?
the number of atoms of hydrogen in hydrogen gas
What is 2?
the number of electrons in bromine's outer shell
What is 7?
the structure of calcium fluoride
What is [Ca]2+ and 2[F]-, with 8 electrons around each fluorine?
A pure substance containing two or more elements
What is a compound?
When a atom shares two electrons with another atom
What is a double bond?
the formula for dinitrogen monoxide
What is N2O?
The rule for having a full outer shell
What is the octet rule (duet rule for H, He)?
the structure for iron (III) oxide
What is 2[Fe]3+ and 3[O]2- with 8 electrons around each oxygen?
A hard, crystalline compound composed of positive metal ions and negative non-metal ions
What is an ionic salt?
The type of bond between 2 nitrogen atoms
What is a triple bond?
the total number of atoms in a molecule of carbon dioxide
What is 3?