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How many elements make up period 1?
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.
Which element is its own family?
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.
Are hydrogen oxygen and helium elements?
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.
How many energy levels would electrons of hydrogen and helium fill?
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.
Why is helium used in a zeppelin?
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.
Could humans live in the planet Saturn why or why not?
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.
Which is lighter - helium or hydrogen?
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.
What electrons have only one orbit or shell?
hydrogen (H) and helium (He)
How many elements make up period 1?
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.
How many elements are there in the first period of periodic table?
There are 2 elements in the first period of the periodic table: Hydrogen and Helium.
Which elements have only 1 electron orbit or shell?
Hydrogen and Helium
Tiny particles of hydrogen fuses to helium in the sun?
Yes, they do. Because of the enormous gravity of the sun Hydrogen atoms fuse to each other (only 2) to make Helium.
Which element is its own family?
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.
Which elements have only one electron in itz orbit orshell?
hydrogen (H) and helium (He)
In a star atoms combine to form helium atoms?
Hydrogen- the only atom smaller
Are hydrogen oxygen and helium elements?
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.
Is helium only used in balloons and air ships?
Helium is the most used gas for balloons; sometimes hot air and rarely hydrogen.
