Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right? ans. The elements become less metallic The atoms lose their electrons more easily There is an increase in the number of valence electrons The oxides become more acidic

The statement that is not correct about the trends in the properties of the elements of a period on going from left to right is: "The atoms lose their electrons more easily".

As we move from left to right across a period in the periodic table, the elements become less metallic, and more nonmetallic in their properties. This is due to the increase in nuclear charge which attracts the electrons in the valence shell closer to the nucleus and thus, the energy required to remove an electron (ionization energy) increases. Therefore, it becomes more difficult for atoms to lose their electrons, not easier.

The other statements are correct. The number of valence electrons does increase as we move from left to right across a period. This is because each element in a period has one more proton and one more electron than the element before it.

Also, the oxides of the elements do become more acidic as we move from left to right across a period. This is because nonmetals, which are found on the right side of the periodic table, tend to form acidic oxides.