Periodic Trends

Question 1

what is the horizontal trend

Answer 1

across period determines the number of electron shells

Question 2

what is the vertical trend

Answer 2

down groups determines number of valence electrons

Question 3

what is the metalic trend

Answer 3

from left to right shows change from metalic to non metalic

Question 4

explain the halogen element group (5 POINTS)

Answer 4

group 17, reactive, non-metal, make ionic compounds with metals, ion is-1

Question 5

explain the noble gases element group (5 POINTS)

Answer 5

group 18, low reactivty, non metal, gas, unlikely to make compounds

Question 6

explain the alkali metals element group (6 POINTS)

Answer 6

group 1, reactive, metal, low melting point, make ionic compounds, make +1 ions

Question 7

explain the alkali earth metal element group (5 POINTS)

Answer 7

group 2, reactive, metal, produce ionic compound, +2 ions

Question 8

What does quantam mechanical model explain

Answer 8

QMM explains repeating chemical behaviour through the understanding of number of electrons and shell organisation

Question 9

what does the QMM state

Answer 9

the further away a shell is from nucleus the more energy it has