Matter, in simplest terms, is anything that has mass and occupies space. Matter has four different forms or states: solid (such as iron or rock, etc.), liquid (such as water, milk, etc.) , gas (such as oxygen, nitrogen, etc.) and plasma. Helium is an element and is a gas. Gases are characterized by loosely held atoms and large inter-atomic spacing. This results in weak intermolecular bonds. In fact, helium is a noble gas.
Helium has an atomic number of 2 and thus has an electronic configuration of 1s2. It has a fully filled outer electronic orbital and hence is a noble gas. It is inert in nature and is the first of noble gases in the periodic table of elements. At extremely low temperatures, helium exists as a liquid, but under standard conditions, it is a gas.
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