powerpoint 4.1

Question 1

mendeleev

Answer 1

1869 - ordered periodic table based on atomic mass

Question 2

moseley

Answer 2

1914 - ordered periodic table based on atomic number

Question 3

moseley’s periodic law

Answer 3

the physical/chemical properties of an element are a periodic function of their atomic number (elements in the same group (column) have similar physical/chemical properties)

Question 4

atomic number

Answer 4

number of protons (and electrons if its a neutral charge)

Question 5

atomic mass

Answer 5

protons + neutrons

Question 6

regular notation

Answer 6

atomic # top, atomic mass bottom

Question 7

isotope notation

Answer 7

atomic # bottom, atomic mass top

Question 8

groups

Answer 8

columns, elements in each column have similar chemical properties

Question 9

rows

Answer 9

how many energy levels each element on the row has

Question 10

metals

Answer 10

good conductors of heat and electricity, make pos charged ions

Question 11

non-metals

Answer 11

shitty conductors of heat & electricity, make neg charged ions (except hydrogen)

Question 12

list all the non metals

Answer 12

hydrogen, carbon, nitrogen, oxygen, fluorine, neon, phosphorus, sulfur, chlorine, argon, bromine, krypton, iodine, xenon, radon, helium

Question 13

semi-metals

Answer 13

metallic and non metallic properties, negatively charged ions

Question 14

list all the semi metals

Answer 14

boron, arsenic, antimony, selenium, silicon, polonium, tellurium

Question 15

transition metals

Answer 15

elements which have valence electrons in two shells, not one

Question 16

valence electrons

Answer 16

electrons in the outermost energy level

Question 17

what is the correlation between columns and valence electrons

Answer 17

group 1 - 1 valence
group 2 - 2 valence
group 13 to 18:
VE = group number - 10

Question 18

alkali metals

Answer 18

group 1, hydrogen not included
alkali + halogens = “salt”

Question 19

alkali earth metals

Answer 19

group 2, less reactive than alkali metals

Question 20

halogens

Answer 20

group 17

Question 21

noble gases

Answer 21

group 18, dont react with other elements (except xenon)

Question 22

rare earth elements

Answer 22

the 2 isolated rows
top - lanthanides
bottom - actinides

Question 23

cation

Answer 23

positively charged atom, u take away electrons to get it

Question 24

anion

Answer 24

negatively charged atom, u add electrons to get it

Question 25

what do metals on the left like to form

Answer 25

cations

Question 26

what do nonmetals like to form with the exception of WHICH nonmetal

Answer 26

anions (NOT hydrogen)

Question 27

what elements hold onto their valence electrons the most strongly

Answer 27

noble gases