Answer:
The symbol for decimeter is dm
Explanation:
No need for an explanation
It behaved as a catalyst (the acid hydrolysis )
As the air molecules move through the valve they have friction as they hit the walls, and its this friction that causes it to heat up.
The correct option is STRONTIUM.
Strontium is a group 2 element, that means it has two electrons in its outermost shell. This element will prefer to lose these two electrons in its outermost shell in order to attain the octet form, therefore, it will form electrovalent bond with non metals which it can donate two electrons to.
