Which of the following describes the element He? Choose all that apply. ?

Which of the following describes the element He? Choose all that apply. 

(1). is very reactive as a metal

(2). forms a basic solution in water

(3). consists of diatomic molecules in elemental form

(4). is one of the group of the least reactive elements

(5). reacts vigorously with alkali metals to form salts

(6). belongs to a group consisting entirely of gases

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  • 6 months ago
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    Answers are 3,4 and 6...

    It has a formula of He2 with 2 helium atoms and is a diatonic molecule.

    Noble gasses are least reactive and He is also an noble gas..

    Group 18 is totally consisting of gasses

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