No.
Only two: hydrogen and helium. This corresponds to the fact that there can be only two s orbital electrons in any electron shell, and the first shell has only s orbital electrons.
Helium is the only element that belongs to a family of its own, as it is part of the noble gases family, which consists of helium, neon, argon, krypton, xenon, and radon.
Yes, hydrogen, oxygen, and helium are elements. They are all pure substances made up of only one type of atom. Helium is the second lightest element, hydrogen is the lightest, and oxygen is the third most abundant element in the universe.
Electrons of hydrogen fill up to two energy levels, while electrons of helium fill up to a total of two energy levels as well. Helium has an additional energy level compared to hydrogen because it has 2 electrons, filling up both the first and second energy level.
Helium is much less dense than air, meaning it can provide lift. The only gas lighter than helium is hydrogen, which is too dangerous to use for such a purpose because it is extremely flammable. Helium, on the other hand is completely nonflammable. Aside from hydrogen no other gas is anywhere near as light as helium.
Humans could not live on Saturn because it is a gas giant composed mostly of hydrogen and helium with no solid surface to support life. The extreme atmospheric pressure and temperatures would also be inhospitable to human life.
Helium is lighter than hydrogen. Helium has an atomic number of 2, which means it has two protons and two neutrons in its nucleus, making it lighter than hydrogen, which has only one proton in its nucleus.
hydrogen (H) and helium (He)
Only two: hydrogen and helium. This corresponds to the fact that there can be only two s orbital electrons in any electron shell, and the first shell has only s orbital electrons.
There are 2 elements in the first period of the periodic table: Hydrogen and Helium.
Hydrogen and Helium
Yes, they do. Because of the enormous gravity of the sun Hydrogen atoms fuse to each other (only 2) to make Helium.
Helium is the only element that belongs to a family of its own, as it is part of the noble gases family, which consists of helium, neon, argon, krypton, xenon, and radon.
hydrogen (H) and helium (He)
Hydrogen- the only atom smaller
Yes, hydrogen, oxygen, and helium are elements. They are all pure substances made up of only one type of atom. Helium is the second lightest element, hydrogen is the lightest, and oxygen is the third most abundant element in the universe.
Helium is the most used gas for balloons; sometimes hot air and rarely hydrogen.