Chemistry- periodic table and periodicity

atomic mass

what property did Mendeleev arrange the elements

atomic number

what property did Moseley suggest the periodic table be arranged?

periodically

The periodic law are THE PROPERTIES OF THE ELEMENTS REPEAT ___________

period

A HORIZONTAL ROW IN THE PERIODIC TABLE

group

A VERTICAL COLUMN IN THE PERIODIC TABLE

7

how many periods in the periodic table?

18

how many groups in the periodic table?

5

how many valence electrons in arsenic?

gallium

what element is atomic number 31?

Th

what is the chemical symbol for atomic number 90

2

what is the period number for Beryllium(atomic number 4)

14

what is the group number for Lead(Pb atomic number 82)

D

what block are the transition elements in?

block f

what type of orbitals are the actinide and lanthanide electrons found?

valence electrons

strontium is more chemically similar to calcium because the same amount of __________ ________ .

radon

what is the heaviest noble gas

protons

to tell which element is heavier you compare the number of __________, which ever has more is more heavy

alkali metals

what are group 1 elements called

alkaline earth metals

what are the group 2 metals called

halogens

what are the group 17 elements called

noble gases

what are the group 18 elements called

halogen

what is the name of the valence shell electron configuration s^2 p^5

valence

all members of a group have the same amount of _____ electrons

atomic radius

distance from the center of the nucleus to the outermost isolated electron.

increases

what happens to the atomic radius as you go down the column?

decreases

what happens to the atomic radius as the atomic number increases

electron

neutral atoms convert into cations by losing an __________

acquire

neutral atoms convert into anions by _________ an electron

cation

metals usually form ________(type of ion)

anions

non metals usually form ________

ionization energy

THE ENERGY REQUIRED TO REMOVE AN ELECTRON FROM AN ATOM

electrons

First, second, and third ionization energies are is the energy it takes to remove the first, second, and third __________

increases

as you go left to right, ionization energy ______

decreases

as you go down a group, ionization energy _______

anion

when an atom becomes an ________, the radius becomes larger

smaller

when an atom becomes a cation, its radius becomes _________s

left

where are the metals located on the periodic table

right

where are the non metals located

electronegativity

THE TENDENCY FOR AN ATOM TO ATTRACT ELECTRONS TO ITSELF

decreases

as you go down the table, electronegativity _______

increases

as you go across, electronegativity ___________