Which one of the following elements is a metal that reacts violently with water

Question

Which one of the following elements is a metal that reacts violently with water to produce hydrogen gas? chlorine helium aluminum potassium boron magnesium Which one of the following elements exists naturally as a diatomic molecule? chlorine helium aluminum potassium boron magnesium Which one of the following compounds is an alkaline earth metal? chlorine helium aluminum potassium boron magnesium Write down the name for the compound NH_4ClO_3:____________Covalent bonding occurs when: electrons are transferred between metal and nonmetal atoms electrons are shared between metal and nonmetal atoms electrons arc shared between two nonmetal atoms. electrons are gained by one atom electrons are lost by one atom Ernest Rutherford conducted an experiment in which he bombarded a thin foil with alpha particles. The fact that some alpha particles were deflected at large angles: led to the concept of the nuclear atom. proved the existence of electrons. is not

Explanation / Answer

Group 1 metals react violently with water to produce hydrogen gas. The group 1 metals are: Li, Na, K, Rb, Cs.

Of the given options, only potassium is a group 1 metal. So the answer is (d) potassium.

Chlorine, boron and Helium are not metals. Aluminum and magnesium are not group I metals

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