Question 1
Sodium is a member of the family called ________.
◦ alkali metals
◦ earth alkali metals
◦ metalloids
◦ actinide metals
◦ transition metals
Question 2
The atomic mass interval for carbon is given as [ 12.0096; 12.0116 ]. Which of the below statements is correct regarding this atomic mass interval?
◦ 12.0106 represents the most likely value of the atomic mass of carbon
◦ 0.00207 represents the uncertainty in the value of atomic mass of carbon
◦ The upper and lower bound of the atomic weight interval are based on the periodic table
◦ This interval indicates that the atomic mass of carbon would not be lower than 12.0096 and it would not be higher than 12.0116