Why are sodium (Na) and potassium (K) in the same group on the periodic table? (1 point)
They are both hard and brittle.
They have similar reactivity.
They have similar atomic weights.
O They are both colorless.
They have similar reactivity.
The correct answer is: They have similar reactivity.
Sodium (Na) and potassium (K) are in the same group on the periodic table because they have similar reactivity. Elements in the same group tend to have similar chemical properties, including how they react with other elements. Sodium and potassium are both highly reactive metals and readily react with other elements, such as oxygen and water, to form compounds. This similarity in reactivity is one of the reasons why they are grouped together.
Sodium (Na) and potassium (K) are in the same group on the periodic table because they have similar reactivity. The periodic table is organized in such a way that elements with similar properties are grouped together. In this case, sodium and potassium both belong to Group 1, which is also known as the alkali metals group. Alkali metals, including sodium and potassium, are highly reactive due to their tendency to lose one electron and form a positive ion, so they exhibit similar chemical behaviors.
To determine this, we can look at the periodic table. The periodic table is arranged in periods (rows) and groups (columns). Elements in the same group have similar properties because they have the same number of valence electrons, which are the electrons in the outermost shell. Sodium and potassium are both located in Group 1, also known as the alkali metals group, which means they have one valence electron. This similarity in valence electron configuration results in similar chemical behavior.
To find the positions of sodium and potassium on the periodic table, you can simply search for them in any reliable periodic table resource, such as a book or an online source.