Periodicity

Question 1

What pattern is followed down a group in the periodic table

Answer 1

• The contain the same amount of electrons in the outermost electron shell
• Resulting in similar chemical properties

Question 2

What pattern is followed along a period in the periodic table

Answer 2

• They are arranged in order of increasing atomic number
• this means they are arranged in order of increasing outer electrons

Question 3

What pattern is followed with covalent radius along the period

Answer 3

• Covalent radius decreases
• increase of attraction of outer electrons to the nucleus

Question 4

What pattern is followed with covalent radius going down a group

Answer 4

• The covalent radius increase
• due to an increase of Shielding effect

Question 5

What is the first ionisation energy

Answer 5

• The energy required to remove one mole of electrons from one mole of gaseous atoms

Question 6

What is the second ionisation energy

Answer 6

• The second energy ionisation is the amount of energy required to remove a second mole of electrons

Question 7

What is the third ionisation energy

Answer 7

• The third ionisation energy is the amount of energy required to remove a third mole of electrons

Question 8

What trend is followed along a period in Ionisation Energy

Answer 8

• The ionisation energies increase along a period
• Due to an increase number of protons
• Increased number of attraction between these protons and electrons

Question 9

What trend is followed down a group in Ionisation Energy

Answer 9

• The ionisation energies decrease down a group
• Increased number of electron shells
• Increased distance between outside energy level and the nucleus

Question 10

Why is there a large increase of ionisation energy in the third ionisation energy of Magnesium

Answer 10

• This is because the ionisation will remove a full shell this time

Question 11

What pattern is followed down a group in electronegativity

Answer 11

• Electronegativity increases as you go down a group
• an increased Shielding effect

Question 12

What trend is followed along a period in Electronegativity

Answer 12

• Electronegativity increases along a period
• increased number of electrons
• increased attraction with protons in the nucleus

Question 13

What is the most electronegative element

Answer 13

Fluorine