3.1
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
What is a chemical formula?
An atom that is no longer elivtrally neautral because it has lost or gained valence electron.
What is an ion?
The starting substances ina chemical reaction.
What are reactants?
What do subscript inficate in a chemical formula?
Shows the number of atoms of each element in a compound
A bound found when many metal atoms share their pooles valence electrons.
What is a metallic bond?
The substances produced by the chemical reactions.
What are products?
What is a double covalent bond?
It exists when two atoms share two pairs of valence electrons.
The valence electrons at the surface of a metal interact with light.
Why are metals shiny?
It states that the total mass of the reactants before a chemical reaction is the same as tbe total mass of the products after chemical reaction.
What is the law of conservation of mass?
A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons.
What is a polar molecule?
What is the atomiv number of sodium?
11
Conserved
Atoms are blank*
To do a covalent bond is when 2 or more atoms share 1 or more pairs of valence electrons.
How are valence electrons invovled in covalent bonding.
How many valence electrons are in chlorine?
7
Is a description of a reaction using element symbols and chemical formulas.
What is a chemical equation?