Chem unit 4

Question 1

First person to arrange the element by similar properties in increasing atomic mass

Answer 1

John newlands

Question 2

Who published the periodic table in 1869

Answer 2

lothar Meyer

Question 3

Who arranged to the elements by the atomic number

Answer 3

Henry Mosely

Question 3

Who published the periodic table in 1870 leaving gaps for undiscovered elements and arrange them by weight

Answer 3

Dimitri mendeleev

Question 4

Elements properties and function functions of their atomic number

Answer 4

Periodic law

Question 5

To the left of the staircase, mostly solid at temperature except mercury

Answer 5

Metals

Question 6

Group =

Answer 6

Column

Question 6

Periods =

Answer 6

Rows

Question 7

Right of staircase, liquids, and gases at room temp

Answer 7

Nonmetals

Question 8

Two sides, touching staircase, except aluminum

Answer 8

Metalloids/semi conductors

Question 8

S&P Block

Answer 8

Main group elements

Question 9

Group Except h, very reactive with water, one valence electron, soft and shiny, lower boiling point and melting point that most metals

Answer 9

Alkali metals

Question 10

, two valence electrons, harder and more dense, higher melting point in boiling point, dull in color

Answer 10

Alkali earth metals

Question 11

D&F block, wide range of properties

Answer 11

Transition metals

Question 12

4F row

Answer 12

Lathanides

Question 13

5F row

Answer 13

Actinides

Question 14

Transition metals, Actinides and lathanides are

Answer 14

All radioactive

Question 15

very reactive with metals Which form salts (Any ionic compound that doesn’t contain h+ or OH-)

Answer 15

Halogens

Question 16

very unreactive, full octet stable

Answer 16

Noble gases

Question 17

Group of its own

Answer 17

Hydrogen

Question 18

Patterns of properties of elements

Answer 18

Periodic trend

Question 19

Tendency of an atom to attract electrons

Answer 19

Electronegativity

Question 20

Electronegativities trend

Answer 20

Increases right and up

Question 21

Reasons for electronegativities trend. L-R

Answer 21

More protons and nucleus equals greater effective nuclear charge, greater attraction for electrons

Question 22

Reasons for electronegativities trend going up

Answer 22

Valence electrons get closer to the nucleus and there’s less electron shielding equals stronger pool on electrons

Question 23

Core electrons shield, valence electrons

Answer 23

Electron shielding

Question 24

Energy required to remove electrons

Answer 24

Ionization energy

Question 25

Trend for ionization energy

Answer 25

Increases Right and up

Question 26

Reasons for ionization trend left to right

Answer 26

same an EN, more protons greater effective nuclear charge = greater pool on electrons = more energy to remove electrons

Question 27

Reasons for ionization energy bottom up

Answer 27

same as EN, Valence electrons are closer to nucleus and less shielding means greater on electrons and more energy to remove electrons

Question 28

Half the distance between center of two nuclei

Answer 28

Atomic radius

Question 29

Trend for atomic radius

Answer 29

Increases Down and left

Question 30

Reason for trend in atomic radius right to left

Answer 30

Who were protons less effective nuclear charge? E/E repulsion increases meaning bigger atoms.

Question 31

Reasons for atomic radius trend to increase going down

Answer 31

Valance electrons get farther from nucleus and move electrons shielding

Question 32

Cations in atomic radius

Answer 32

Decrease e/e repulsion and radius decreases

Question 33

Anions in atomic radius

Answer 33

Increases e/e repulsion and radius increases

Question 34

Energy given off when an electron is added

Answer 34

Electron affinity

Question 35

Trend for electron affinity

Answer 35

Gets more negative to the right and up

Question 36

Reasons for electron affinity

Answer 36

Gives off energy equals more stable

Question 37

Most metallic elements are lower on the periodic table

Answer 37

Metallic character