# How many neutrons does helium have if its atomic mass is 4 U?

## How many neutrons does helium have if its atomic mass is 4 U?

Therefore, No. of Neutrons in Helium atom = 2.

## What is a mass of 4u?

Helium atom has an atomic mass of 4 u and two protons in its nucleus.

## How is the atomic mass of helium-4?

Helium-4 atom is the stable isotope of helium with relative atomic mass 4.002603. The most abundant (99.99 atom percent) isotope of naturally occurring helium.

## What is the mass of helium-4 in kg?

The mass of a Helium-4 nucleus is 6.7×10^-27 kg and the radius is 1.9 fm (femtometres).

## Does helium atom has an atomic mass of 4 U and two protons in its nucleus?

Solution: The above statement is true. The atomic mass of the helium atom is 4, and the number of protons is 2.

## What is a helium-4 atom?

Helium-4 ( 4. He. ) is a stable isotope of the element helium. It is by far the more abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth. Its nucleus is identical to an alpha particle, and consists of two protons and two neutrons.

## What does 4u mean in physics?

Helium atoms have a mass of 4u and oxygen molecules have a mass of 32u, where u is defined as an atomic mass unit (u = 1.660540 x 10 kg). Compare a gas of helium atoms to a gas of oxygen molecules.

## What is 1u mass equal to?

In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass. This is approximately 1.67377 x 10^ -27 kilogram (kg), or 1.67377 x 10 ^-24 gram (g).

## What is the atomic number of helium 4?

Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons. Since 2+2=4, we know that the mass number of the helium atom is 4.

## Where is helium-4?

Many helium-4 on Earth is produced from the alpha decay of heavy elements. In the Sun and the whole universe, most helium-4 is made during the Big Bang, the event that created the universe. This Big Bang helium-4 is known as the primordial helium. Helium-4 is also made in nuclear fusion at the center of stars.

## Why is helium-4 special?

When cooled to temperatures below minus 452 degrees below zero Fahrenheit, helium-4 becomes a liquid — and an extraordinary liquid at that. At very low temperatures, helium-4 can become a superfluid, a liquid without viscosity that can flow unhampered by friction.

## What does the 4 mean in helium-4?

Answer and Explanation: The 4 in helium-4 represents the atomic mass of one atom of the helium-4 element.

## What is the atomic mass of helium 3 and 4?

Because of its low atomic mass of 3.016 u, helium-3 has some physical properties different from those of helium-4, with a mass of 4.0026 u. Because of the weak, induced dipole–dipole interaction between the helium atoms, their microscopic physical properties are mainly determined by their zero-point energy.

## What is the mass of helium-4 in grams?

The mass of Helium-4 atom is 6.64648 x 10^-24 g and each of its two electrons has a mass of…

## What is 4 kg in mass?

So, 4 kg = 4 × 1000 g = 4000 g.

## What are the neutrons in helium-4?

There are two neutrons and two protons in a single atom of helium-4.

## How many electrons will helium have if its mass number is 4?

Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons. Since 2+2=4, we know that the mass number of the helium atom is 4. Finally, the helium atom also contains two electrons, since the number of electrons must equal the number of protons.

## How many neutrons and electrons does helium-4 have?

Helium-4 is made of 2 protons (the part of an atomic nucleus with a positive charge), 2 neutrons (the part of an atomic nucleus with no charge) and 2 electrons (the part of an atom that goes around the nucleus with a negative charge).

## Can helium have 4 neutrons?

Helium can have any number of neutrons. Helium nuclides that have measured lifetimes and some bound character have between one and eight neutrons. There are two stable and naturally-occurring isotopes, He-3 (1 neutron, very rare) and He-4 (2 neutrons).