Study Guide (Periodic Table and His.)

Question 1

Who attributed to the idea of arranging the known elements of his time in a table according to their chemical/physical properties?

Answer 1

Dmitri Mendeleev

Question 2

_______ predicted that the empty spaces on his periodic table represented

Answer 2

undiscovered elements

Question 3

Who arranged the periodic table in the order of Atomic #?

Answer 3

Henry Moseley

Question 4

The periodic law states there is a periodic repetition of physical/chemical properties of the elements when…

Answer 4

they are arranged in order of increasing atomic #

Question 5

name of vertical columns of the periodic table…

Answer 5

Groups

Question 6

Each period in the periodic table corresponds to:

Answer 6

an energy level

Question 7

Valence electrons:

Answer 7

electrons that are found in the outermost energy level of atoms

Question 8

the horizontal rows of the periodic table are:

Answer 8

periods

Question 9

what do elements in the same periodic group have in common

Answer 9

same # of valence configuration, valence electrons, and similar chemical properties

Question 10

what do elements in the same period have in common

Answer 10

same # of occupied energy levels

Question 11

how many elements are in a period in which only s and p sublevels are filled

Answer 11

8

Question 12

sublevels in a period that contains 32 elements

Answer 12

s,p,d,f

Question 13

(for groups 13-18) # of valence electrons is equal to:

Answer 13

its group # (or group # - 10)

Question 14

Three classes of elements

Answer 14

metals, nonmetals, metalloids

Question 15

(elements classes/ fams) Most reactive group of nonmetals

Answer 15

Halogens

Question 16

(elements classes/ fams) group is unreactive + only found in pure form in nature

Answer 16

Noble gases

Question 17

(elements classes/ fams) groups name is “basic”

Answer 17

Alkaline Earth Metals

Question 18

(elements classes/ fams) group of metals contain groups 3-12

Answer 18

transition metals

Question 19

(elements classes/ fams) group contains most reactive group of metals

Answer 19

alkali metals

Question 20

(elements classes/ fams) elements are found in second row of f-block elements

Answer 20

actinides

Question 21

(elements classes/ fams) class of elements have both metallic/ nonmetallic properties

Answer 21

metalloids

Question 22

(periodic trends) why atomic radius decreases going across the period L to R on periodic table

Answer 22

bc valence electrons are being removed and are closer to positive nucleus (held tighter and harder to remove)

Question 23

(periodic trends) why atomic radius increases moving down a group of elements

Answer 23

of occupied energy level increases

Question 24

ionization energy

Answer 24

energy required to remove one electron from an atom

Question 25

As you move L to R across a period, the first ionization energies

Answer 25

Increases

Question 26

As you move from top to bottom of group, the first ionization energies

Answer 26

decreases

Question 27

What is general trend of electronegativity as you go down the group

Answer 27

electronegativity decreases down the group

Question 28

do metals tend to have high or low electronegativites

Answer 28

Low

Question 29

What is trend for reactivity for the alkali metals group

Answer 29

reactivity increases going down the group

Question 30

what is trend for reactivity for the halogens group?

Answer 30

reactivity decreases going down the group

Question 31

(elements classes/ fams) elements are found in first row of f-block elements

Answer 31

Lanthanides