SCH3U Exam Review

Flashcards for SCH3U Exam Review

Which of the following matches of group number and common name is incorrect?

Group 7 - transition metals

A nonmetal in Period 6 is

iodine

When elements are arranged in order of increasing atomic mass, their chemical properties repeat at regular intervals. This statement is the definition of

periodic law

Why does electron affinity increase from bottom to top in a chemical family?

Nuclear charge increases from bottom to top in a chemical family.

Elements X and Y are in the same chemical family. Element X has a first ionization energy of 7.646 eV. Element Y has an ionization energy of 5.695 eV. Which is more reactive?

Y

Element X is most likely a

Group 1 element

The concept of multiple covalent bonds is used to explain the molecular formula of

O₂

If XF₂ is the correct formula for a metallic fluoride, then the formula for the oxide of X is

XO