Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Give the names of the following elements and the rule used to represent the element.
i. Na
ii. K
iii. C
iv. Ca

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> i. Na - Sodium [0.5 marks]
Sodium is named as Natrium in Latin hence it has the symbol Na. [0.5 marks]

ii. K - Potassium [0.5 marks]
Potassium is named as Kalium in Latin hence it has the symbol K. [0.5 marks]

iii. C - Carbon [0.5 marks]
Carbon has C as its symbol because of its first letter. [0.5 marks]

iv. Ca - Calcium [0.5 marks]
Calcium has Ca as symbol because C is used for carbon and we use Ca for calcium from the first two letters. [0.5 marks]