chem periodic table stuff

what is the period table organized into?

groups snd periods

period

horizontal rows

group

vertical rows

metals

hard, shiny elements that conduct head and electricity

non metals

poor conductors of heat and electricity

metalloids

have properties of both metals and nonmetals

transition metals

groups 3-12

alkali metals

group one

alkaline earth metals

group 2

noble gases

group 18

halogens

group 17

lanthanides

first row of f block

actinides

second row of f block

who attributed with the idea of arranging the known elements of his time in a table according to their chemical and physical properties?

dimitri mendeleev

dimitri predicted that empty spaces on his periodic table represented what?

undiscovered elements

Who arranged the periodic table of elements in the order of atomic number?

henry mosley

what does the period table state when there is a periodic repetition of physical and chemical properties?

they are arranged in order of increasing atomic mass

Each period in the periodic table corresponds to?

principal energy level

What are valence electrons?

electrons in the outermost energy level, or in my words "the groups excluding transition metals"

What do elements in the same periodic group have in common?

same number of valence electrons

What do elements in the same periodic periods have in common?

similar reactions

How many elements are in a period in which only the s and p sublevels are filled?

8

what sublevels are in a period that contains 32 elements

s,p,d,f

The number of valence electrons in Group 17 elements is..

7

For groups 13 through 18, the number of valence electrons is equal to

the group number minus 10

For group 2 elements, which sublevel are the valence electrons located in?

s sublevel

Three classes of elements

metals, nonmetals, metalloids