Why are sodium (Na) and potassium (K) in the same group on the periodic table? (1 point)
O They have similar reactivity.
O They are both hard and brittle.
O They have similar atomic weights.
O They are both colorless.
The correct answer is:
They have similar reactivity.
The correct answer is:
O They have similar reactivity.
Sodium (Na) and potassium (K) are in the same group on the periodic table, group 1, also known as the alkali metals. They are placed in the same group because they have similar chemical properties and reactivity. Alkali metals are known for being highly reactive and readily donating their outermost electron to achieve a stable electron configuration. Both sodium and potassium have a single electron in their outermost energy level, making them behave similarly in chemical reactions.
The correct answer is: They have similar reactivity.
Sodium (Na) and potassium (K) are both in the same group on the periodic table because they have similar reactivity. Groups on the periodic table are vertical columns that contain elements with similar properties. Sodium and potassium are both alkali metals, which are highly reactive metals that readily form positive ions with a charge of +1. They share similar chemical properties due to their similar electronic configurations and tendencies to lose one electron in chemical reactions.
To determine why sodium (Na) and potassium (K) are in the same group on the periodic table, you can look at their group number. Sodium is in Group 1, and potassium is also in Group 1. This indicates that they belong to the same group because elements in the same group have similar outer electron configurations and reactivity patterns.
In summary, sodium (Na) and potassium (K) are in the same group on the periodic table because they have similar reactivity and belong to Group 1, which contains elements with one valence electron.