1.6 The Periodic Table

Question 1

Define oxidation in terms of electron transfer

Answer 1

Oxidation is the loss of electrons

Question 2

define reduction in terms of electron transfer

Answer 2

Reduction is the gain of electrons

Question 3

how do group 2 elements react with oxygen?

Answer 3

2X + O₂ -> 2XO

X = group 2 element

Question 4

how do group 2 elements react with water?

Answer 4

X + 2H₂O -> X(OH)₂ + H₂

Question 5

what is the chemical equation for the reaction between calcium and water?

Answer 5

Ca + 2H₂O -> Ca(OH)₂ + H₂

Question 6

what is the chemical equation for the reaction between strontium and oxygen?

Answer 6

2Sr + O₂ -> 2SrO

Question 7

what is the chemical equation for the reaction between magnesium chloride and sodium carbonate?

Answer 7

MgCl₂ + Na₂CO ₃ -> MgCO ₃ + 2NaCl

Question 8

What colour is observed in flame test for lithium

Answer 8

crimson flame

Question 9

What colour is observed in flame test for sodium

Answer 9

yellow flame

Question 10

What colour is observed in flame test for potassium

Answer 10

lilac

Question 11

What colour is observed in flame test for calcium

Answer 11

orange-red flame

Question 12

What colour is observed in flame test for strontium

Answer 12

red flame

Question 13

trend in reactivity down group 1

Answer 13

increases
- atomic radius and shielding increases
- outer electron lost more easily

Question 14

trend in reactivity down group 2

Answer 14

increases
- atomic radius and shielding increases
- outer electron lost more easily

Question 15

what is the trend in thermal stabilities of group 1 and 2 carbonates

Answer 15

increases down the groups

Question 16

what is the trend in thermal stabilities of group 1 and 2 nitrates

Answer 16

increases down the groups