Question

read the passage and answer the next two questions.
during a classroom experiment, a burning magnesium ribbon was dropped into a glass test tube filled with oxygen. a bright white flame was produced. a white powdery substance formed at the end of the reaction
which other element is likely to show a similar chemical reaction with oxygen as shown by magnesium, and to which group does it belong?
k, it belongs to group 2
ca, it belongs to group 2
c, it belongs to group 1
na, it belongs to group 1

Explanation:

Elements in the same group of the periodic table have similar chemical properties. Magnesium (\(Mg\)) is in Group 2. Calcium (\(Ca\)) is also in Group 2. Potassium (\(K\)) and Sodium (\(Na\)) are in Group 1. Carbon (\(C\)) is in Group 14. Since the question asks for an element with a similar reaction to magnesium (Group 2), calcium (Group 2) is the correct choice.

Answer:

Ca, it belongs to Group 2.