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What element is for times the atomic mass of helium?
Well, two times four is eight, which would be oxygen.
How many times lighter is a helium atom than carbon?
A helium atom is four times lighter than a carbon atom. This is because helium has two protons and two neutrons in its nucleus, while carbon has six protons and six neutrons. The atomic mass of helium is approximately 4 atomic mass units, while the atomic mass of carbon is approximately 12 atomic mass units.
An atom of helium has a mass about four times greater than that of an atom of hydrogen Which choice makes the correct comparison of the relative numbers of helium and hydrogen atoms in equal masses o?
An equal mass of helium would contain fewer atoms compared to hydrogen, as each helium atom is four times heavier than a hydrogen atom. This is because the atomic mass of a helium atom is roughly four times that of a hydrogen atom.
Which element has the smallest atomic size from first 4 periods?
Helium has the smallest atomic size among elements in the first four periods of the periodic table. It has the smallest atomic radius due to its high effective nuclear charge and low electron-electron repulsion.
Why hydrogen diffuses four times more than helium?
Hydrogen has a smaller atomic size and lower atomic mass compared to helium, allowing it to move faster and diffuse more rapidly. Additionally, hydrogen has a higher kinetic energy at a given temperature, which also contributes to its increased diffusion rate.
What element is for times the atomic mass of helium?
Well, two times four is eight, which would be oxygen.
How many times lighter is a helium atom than carbon?
A helium atom is four times lighter than a carbon atom. This is because helium has two protons and two neutrons in its nucleus, while carbon has six protons and six neutrons. The atomic mass of helium is approximately 4 atomic mass units, while the atomic mass of carbon is approximately 12 atomic mass units.
An atom of helium has a mass about four times greater than that of an atom of hydrogen Which choice makes the correct comparison of the relative numbers of helium and hydrogen atoms in equal masses o?
An equal mass of helium would contain fewer atoms compared to hydrogen, as each helium atom is four times heavier than a hydrogen atom. This is because the atomic mass of a helium atom is roughly four times that of a hydrogen atom.
What are the four element that have atomic number less than 8?
There are seven elements with atomic number less than 8: hydrogen, helium, lithium, beryllium, boron, carbon, and nitrogen. I don't know where you got the notion that there were only four. I thought you might be thinking of atomic mass instead, but that doesn't work either ... there are only 3 elements that have stable isotopes with a mass below 8 amu (hydrogen, helium, and lithium). 7Be exists, but it's radioactive.
How many protons does an atomic number of four have?
Four.
Which element has the smallest atomic size from first 4 periods?
Helium has the smallest atomic size among elements in the first four periods of the periodic table. It has the smallest atomic radius due to its high effective nuclear charge and low electron-electron repulsion.
Why hydrogen diffuses four times more than helium?
Hydrogen has a smaller atomic size and lower atomic mass compared to helium, allowing it to move faster and diffuse more rapidly. Additionally, hydrogen has a higher kinetic energy at a given temperature, which also contributes to its increased diffusion rate.
What four pieces of information about each element is found on the periodic table?
Well the four main types really go down to the Atomic Number, Atomic Mass, The Chemical/Atomic symbol, and the elements name of course. But different tables vary.
Is it a lucky accident that avogadro's number of helium atoms weight exactly four grams?
No, it is not a lucky accident. An Avogadro's number of helium atoms do not weigh 4 grams: their mass is four grams and that is NOT the same thing. The mass is related to the atomic mass unit which is, essentially the number of protons and neutrons in an atom. More accurately, it is the weighted average for the atomic mass across the isotopes of the element - weighted according their abundance.
How many neutrons dose the average helium atom contain?
An average helium atom typically contains two neutrons. Helium has an atomic number of 2, meaning it has two protons in its nucleus. The most common isotope of helium, helium-4, has two protons and two neutrons, resulting in its overall atomic mass of four.
What are First four steps of He fusion after Be?
The first four: 1. Be 2. C 3. O 4. Ne How I found this: Since Helium (He) has an atomic number of 2, add two to the atomic number of Be. Since the atomic number of Be is 4, and the atomic number of Helium is 2, you would add four plus two, which equals six. Carbon has an atomic number of six, so therefore it would be your next answer. The formula is the atomic number of Helium plus the atomic number of element you are provided with equals the atomic number of your answer. In simpler terms: atomic number of He+atomic number= atomic number of answer
What was important about atomic theory?
It disproved Aristotle's four-element theory of matter.
