3 elements that have the same properties most like Helium
To find three elements that have properties similar to helium, we need to consider certain characteristics of helium and look for other elements that share those characteristics. Here are some properties of helium:
1. Atomic number: Helium has an atomic number of 2, which means it has two protons in its nucleus.
2. Atomic mass: Helium has an atomic mass of approximately 4 atomic mass units (AMU).
3. State of matter: At room temperature and normal atmospheric pressure, helium is a gas.
4. Inertness: Helium is a chemically inert element, meaning it does not readily react with other elements or compounds.
5. Density: Helium is less dense than air, which is why it can make objects float, such as balloons.
Based on these properties, three other elements that exhibit similarities to helium are:
1. Neon (Ne): Neon, with an atomic number of 10 and atomic mass of approximately 20 AMU, shares similar inertness and gaseous state at room temperature. Like helium, neon is chemically stable and doesn't readily form compounds.
2. Argon (Ar): Argon has an atomic number of 18 and atomic mass of approximately 40 AMU. It also exists as a gas at room temperature and exhibits inertness similar to helium.
3. Krypton (Kr): Krypton has an atomic number of 36 and atomic mass of approximately 84 AMU. Like helium, neon, and argon, krypton is a noble gas, exists as a gas at room temperature, and shows chemical inertness.
To summarize, neon, argon, and krypton have properties most similar to helium, including their atomic structure, inertness, and gaseous state at room temperature.