Q6 Write down the word that will correctly complete the following sentences:

a) The relative atomic mass of a light element up to calcium is approximately ……….. its atomic number.
b) The horizontal row quess in a periodic table are called ………
c) Going across a period left to right, atomic size………..
d) Moving left to right in the second period, the number of valence electrons…….
e) Moving down in the second group, the number of valence electrons …………

Solution