Smallest particle of an element

(a)  

part of the nucleus of an atom, positively charged

(a)  

makes up part of the nucleus of an atom

neutral or no charge

(a)  

located outside the nucleus of the atom, negatively charged, in constant motion around the nucleus

(a)  

number of protons in an atom

(a)  

mass of a set # of atoms in an element

(a)  

# of electrons in the outermost shell

(a)  

A row on the periodic table

indicates # of shells

(a)  

column in periodic table

has same # of valence electrons

(a)  

Li family

1 valence electron

VERY reactive because only needs to get rid of 1 valence electron to complete a shell

always in a compound

(a)  

Mg family

2 valence electrons

fairly reactive because only needs to get rid of 2 valence electrons to complete a shell

(a)  

F family

7 valence electrons

Most reactive nonmetal family because it only needs to gain 1 electron to complete a shell

Always in the form of a compound

(a)  

He family

complete shell

does not react with other elements because it already has a complete shell

(a)  

an element that has properties of both metals and nonmetals

located between metal and nonmetals

(a)  

typical metals that we know

located in the middle valley area

(a)  

Elements that are good conductors of electric current and heat.

Ductile and malleable

Mostly solids at room temperature

Low number of valence electrons located to the left of the metalloids

Nonmetals

(a)  

Elements that are poor conductors of heat and electric current

Not ductile or malleable

Mostly gases at room temperature

higher number of valence electrons

(a)  

Atoms of the same element that have different numbers of neutrons

(a)  

The 14 elements with atomic numbers from 58 to 71

located in first row below the main part of Periodic Table

(a)  

the 14 elements with atomic numbers from 90 to 103

located in the second row below the main part of the Periodic Table

(a)  

compound made from two or more nonmetals

(a)  

compound made from metal and not metal

(a)