An unknown element X has the following properties:

An element Y reacts vigorously with water to produce hydrogen gas and a strong alkaline solution. Where is Y most likely located in the Periodic Table?

An element has 7 electrons in its outermost shell and forms a diatomic molecule in its elemental state. It is most likely:

An unknown element Z is hard, has a high melting point, and forms acidic oxides. It is most likely:

Element A has atomic number 12. Without using the periodic table directly, its properties suggest it is:

An element shows the following behavior:

An element forms an oxide that dissolves in water to give a strong acid. This element is likely in:

A substance is chemically inert, exists as monoatomic gas, and does not form compounds easily. It belongs to:

An unknown element forms ionic compounds with chlorine and has two electrons in its outer shell. It is most likely:

Element X has properties:

An element reacts with oxygen to form a basic oxide and is highly reactive. It is most likely found in:

An element has atomic number 17. It is expected to:

A substance conducts electricity only when molten or dissolved in water. It is likely:

An element has high ionization energy and low reactivity. It is most likely:

An unknown element forms + 1 ions easily and is stored under oil due to high reactivity. It belongs to:

An element forms acidic oxide and is located on the right side of Periodic Table. It is most likely:

An element has 3 valence electrons and forms covalent as well as ionic compounds. It is likely:

An unknown element X is:

An element forms covalent molecules and exists as diatomic gas. It is most likely:

An element has a full outer shell and does not react easily. It is placed in: