Periodicity

Question 1

Period {Where is similarity of electrons}

Answer 1

Horizontal rows on PT (7 main) {same in outer level}

Question 2

First ionization energy

Answer 2

Energy required to remove one electron from an atom

Question 3

Electronegativity

Answer 3

Measure of an atoms relative ability to attract a bonding pair of electrons to itself

Question 4

Atomic radius

Answer 4

The size of the Atom

Question 5

Trends of atomic radius

Answer 5

Increases down a group, decreases across a period

Question 6

Ionic radius

Answer 6

Size of the ion

Question 7

Trends of ionic radius

Answer 7

Positive ions are smaller, negative are larger

Question 8

Trends of ionization energy

Answer 8

Decreased down a group, increases across a period

Question 9

Shielding effect

Answer 9

Inner electron shells shield the attractive drove of the nucleus an the outermost electrons

Question 10

trends of electronegativity

Answer 10

Decreases down a group , increases across a period

Question 11

Electron affinity

Answer 11

Energy required to detach an electron from the singly charged negative ion in the gas phase

Question 12

Trends of electron affinity

Answer 12

Increases across a period, decreases down group 1 but patterns vary by group(no pattern)

Question 13

Compare relative electronegativity

Answer 13

Closer an element is to fluorine the more electronegative it is (except noble gases)

Question 14

Alkali metals react VIOLENTLY with _____ as you move down group 1

Answer 14

Water: hydrogen is flammable and the reaction is very exothermic

Question 15

Alkali metals react less violently with ____ as you move down group _____

Answer 15

Halogens, group 17

Question 16

Halogens react readily with ______

Answer 16

Halide ions ( F2>Cl2>Br2>I2)

Question 17

Metals (shiny, conductors of electricity)

Answer 17

Sodium magnesium and aluminum

Question 18

Metalloid (has properties of metals and non metals)

Answer 18

Silicon

Question 19

Nonmetals

Answer 19

Phosphorus, sulfur, chlorine, argon

Question 20

Metal oxides

Answer 20

Metal ions bonded to oxide ions

Question 21

Amphoteric

Answer 21

Aluminum can act as acid or base

Question 22

Silicon dioxide

Answer 22

High m&b, insoluble in water, reacts with sodium hydroxide as a base

Question 23

Nonmetal oxides

Answer 23

Covalently bonded atoms, low m&b, react with water to form acidic solutions

Question 24

Argon

Answer 24

Doesn’t form an oxide

Question 25

Group {where is similarity of electrons}

Answer 25

Vertical columns on the PT (18) {same number of valence, superscript}