Chemistry- periodic table and periodicity

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1

atomic mass

what property did Mendeleev arrange the elements

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2

atomic number

what property did Moseley suggest the periodic table be arranged?

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3

periodically

The periodic law are THE PROPERTIES OF THE ELEMENTS REPEAT ___________

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4

period

A HORIZONTAL ROW IN THE PERIODIC TABLE

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5

group

A VERTICAL COLUMN IN THE PERIODIC TABLE

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6

7

how many periods in the periodic table?

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7

18

how many groups in the periodic table?

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8

5

how many valence electrons in arsenic?

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9

gallium

what element is atomic number 31?

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10

Th

what is the chemical symbol for atomic number 90

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11

2

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

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12

14

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

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13

D

what block are the transition elements in?

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14

block f

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

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15

valence electrons

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

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16

radon

what is the heaviest noble gas

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17

protons

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

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18

alkali metals

what are group 1 elements called

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19

alkaline earth metals

what are the group 2 metals called

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20

halogens

what are the group 17 elements called

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21

noble gases

what are the group 18 elements called

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22

halogen

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

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23

valence

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

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24

atomic radius

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

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25

increases

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

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26

decreases

what happens to the atomic radius as the atomic number increases

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27

electron

neutral atoms convert into cations by losing an __________

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28

acquire

neutral atoms convert into anions by _________ an electron

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29

cation

metals usually form ________(type of ion)

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30

anions

non metals usually form ________

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31

ionization energy

THE ENERGY REQUIRED TO REMOVE AN ELECTRON FROM AN ATOM

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32

electrons

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

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33

increases

as you go left to right, ionization energy ______

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34

decreases

as you go down a group, ionization energy _______

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35

anion

when an atom becomes an ________, the radius becomes larger

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36

smaller

when an atom becomes a cation, its radius becomes _________s

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37

left

where are the metals located on the periodic table

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38

right

where are the non metals located

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39

electronegativity

THE TENDENCY FOR AN ATOM TO ATTRACT ELECTRONS TO ITSELF

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40

decreases

as you go down the table, electronegativity _______

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41

increases

as you go across, electronegativity ___________

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