Topic 3.1 - Periodic Table

Question 1

How are elements placed on the periodic table

Answer 1

increasing atomic number (number of protons)

Question 2

What does the period that an element is in suggest

Answer 2

the number of occupied electron principal energy levels

Question 3

What do the sub-levels s,p,d,f mean

Answer 3

Elements in a block have their valence electrons in that sub-level.

Question 4

what do the number of valence electrons determine

Answer 4

• chemical properties
• reactivity
• type and number of bonds an atom can form
• if it is a metal or non-metal
• group number

Question 5

what does the arrangement of valance electrons determine

Answer 5

• determining the physical properties
• melting + boiling points
  -e.g. elements with a full subshell tend to be more stable - higher mpt + bpt

Question 6

What are the different groups of elements

Answer 6

alkali metals, alkaline earth metals, transition metals, metalloids, non-metals, halogens, noble gases, lanthanides, actinides

Question 7

what is similar about elements in the same group

Answer 7

same number of valence electrons = chemical properties

Question 8

what is similar about elements in the same period

Answer 8

occupy the same number of electron shells/electron energy principal levels

Question 9

properties of metals

Answer 9

• good conductors of heat and electricity
• malleable
• ductile
• lustre
• lose electrons in chemical reactions (oxidisation)

Question 10

properties of non-metals

Answer 10

• poor conductors of heat and electricity
• not malleable or ductile
• gain electrons in chemical reactions (reduction)

Question 11

properties of metalloids

Answer 11

• have properties of both metals and non-metals