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Question 1

mosely

Answer 1

arranged table my atomic number. each elem had its own unique nuclerar charge, he had better technology

Question 2

periodic law

Answer 2

physical and chemical properties

Question 3

periods

Answer 3

horizontal

Question 4

family/group

Answer 4

verticle

Question 5

noble gases (group18)

Answer 5

inert. when an element loses/gain e- they do so to become like a…

Question 6

Helium is considered

Answer 6

a noble gas because its highest energy level is full

Question 7

S block (group 1)

Answer 7

alkali metals, very reactive with non metals. losing e- will make it stable

Question 8

s block group2)

Answer 8

alkaline earth metals - higher melting point and less reactive because it takes more work to rid 2 e-

Question 9

d block(3-12)

Answer 9

transition metals (not as reactive) higher m.p

Question 10

lanthanides (57-71)

Answer 10

shiny reactive metals

Question 10

p block (13-18)

Answer 10

main group elements includes non metals, metals, and metalloids

Question 10

halogens(group 17)

Answer 10

react vigorously with metals to form salts and most reactive non metals cause they need 1 more e-

Question 11

actinides(89-103)

Answer 11

radioactive elements

Question 12

H

Answer 12

a family unto itself and behaves unlike any other element. reacts rapidly with most other elements

Question 13

atomic radius(trend)

Answer 13

generally increases within a family or down a group. (decreases across a period)

Question 14

shielding effect

Answer 14

as the levels fill they become less positively charged

Question 14

ionization energy

Answer 14

amount of energy needed to remove an e-

Question 15

atomic size(trend)

Answer 15

decreases from left to right across a period.

Question 16

ion

Answer 16

an atom that has a positive of negative charge

Question 17

ionization energy trend

Answer 17

decreases down a group but increases across a period

Question 17

e- affinity trend

Answer 17

decreases across a period and decreases up a group

Question 18

electron affinity can be

Answer 18

positive or negative number. neg: energy is released when e- is added
pos: atom is forced to gain e- unstable

Question 19

electron affinity

Answer 19

the energy change when an e- is added to an atom.

Question 20

positive ions

Answer 20

cations lose one e- and this decreases radius

Question 21

negative ions

Answer 21

anions gain e- and this increases radius

Question 22

electronegativity

Answer 22

measure of the ability of an atom in a compound to attract e- from another atom in the compound

Question 23

electronegativity trend

Answer 23

increases within a period and decreases down a period