What is the relative atomic mass of helium ?

1 Answer

Answer :

The relative atomic mass of helium is four.

Related questions

Description : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic mass 234, the

Last Answer : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic ... )^(234)Th` D. `._(91)^(234)Pa`

Description : What is the relative atomic mass of scandium ?

Last Answer : The relative atomic mass of scandium is 45 .

Description : What is the relative atomic mass of calcium ?

Last Answer : The relative atomic mass of calcium is 40 .

Description : What is the relative atomic mass of potassium ?

Last Answer : : Atomic mass relative to potassium 39 .

Description : What is the relative atomic mass of argon ?

Last Answer : The relative atomic mass of argon is 40 .

Description : What is the relative atomic mass of chlorine ?

Last Answer : The relative atomic mass of chlorine is 35 .

Description : What is the relative atomic mass of sulfur ?

Last Answer : The relative atomic mass of sulfur is 32 .

Description : What is the relative atomic mass of phosphorus ?

Last Answer : The relative atomic mass of phosphorus is 30 .

Description : What is the relative atomic mass of silicon ?

Last Answer : Relative atomic mass of silicon 28 .

Description : What is the relative atomic mass of aluminum ?

Last Answer : Relative atomic mass of aluminum 27 .

Description : What is the relative atomic mass of magnesium ?

Last Answer : The relative atomic mass of magnesium is 24 .

Description : What is the relative atomic mass of sodium ?

Last Answer : Relative atomic mass of sodium 23 .

Description : What is the relative atomic mass of neon ?

Last Answer : Relative atomic mass of neon 20 .

Description : What is the relative atomic mass of fluorine ?

Last Answer : The relative atomic mass of fluorine is 19 .

Description : What is the relative atomic mass of oxygen ?

Last Answer : Relative atomic mass of oxygen 16 .

Description : What is the relative atomic mass of nitrogen ?

Last Answer : Relative atomic mass of nitrogen 14 .

Description : What is the relative atomic mass of carbon ?

Last Answer : Relative atomic mass of carbon 12 .

Description : What is the relative atomic mass of beryllium ?

Last Answer : : Relative atomic mass of beryllium 9 .

Description : What is the relative atomic mass of lithium ?

Last Answer : The relative atomic mass of lithium is seven.

Description : What is the relative atomic mass of hydrogen ?

Last Answer : The relative atomic mass of hydrogen is one.

Description : What is the relative atomic mass ?

Last Answer : An atom of an element is as much heavier than 1/12 of the carbon-12 isotope of atom is called the relative atomic mass of that element.

Description : What is the atomic number of helium ?

Last Answer : Helium has atomic number two.

Description : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas

Last Answer : it is lighter than air

Description : What is meant by the relative atomic mass of carbon 12 ?

Last Answer : : Atomic mass of carbon 12 means: - From the application of the number Avogadro, we know that 6.02 10 ^ 23 is the actual mass of 23 atoms = its molecular mass ( M). So , the actual mass ... of carbon- 12 atoms. Another notable difference is that there is a unit of atomic mass but no unit of mass.

Last Answer : O Relative atomic mass 32

Last Answer : Relative atomic mass 1.008

Description : What is the difference between relative isotopic mass and relative atomic mass?

Last Answer : Atomic Mass is the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or ... may be MANY individual Relative Isotopic Masses for an Element (depending on how many Isotopes it has).

Description : (2) it is lighter than air Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass ... elements combined. A well-known but minor use is as a lifting gas in balloons and airships

Last Answer : Ammonial is a mixture of – (1) aluminium powder and ammonium nitrate (2) aluminium powder and ammonium chloride (3) aluminium powder and ammonium sulphate (4) aluminium powder and potassium nitrate

Description : How many of the following properties of noble gases would increase from Helium to Radon? Boiling point, First lonisation enthalpy, Atomic volume, Abun

Last Answer : How many of the following properties of noble gases would increase from Helium to Radon? ... Density at STP. Valence electrons, Critical temperature.

Description : What is atomic weight of helium?

Last Answer : 4.002602 g/mol

Description : In which of the following groups, are the elements written in the descending order of their respective atomic weights? (a) Nitrogen, carbon, oxygen, hydrogen (b) Oxygen, argon, nitrogen, hydrogen (c) Oxygen, nitrogen, helium, hydrogen (d) Oxygen, nitrogen, helium, bromine

Last Answer : Ans:(c)

Description : What is the relative atomic number of boron ?

Last Answer : The relative atomic number of boron is 11 .

Description : What is the mass number of a helium atom that has 2 protons and 2 neutrons?

Last Answer : Need answer

Description : What is the mass in grams of one mole of helium atoms?

Last Answer : 6

Description : The mass of one Avogadro number of helium atom is (a) 1.00 g (b) 4.00 g (c) 8.00 g (d) 6.02 × 1023 g

Last Answer : Ans:(b)

Description : The mass of one Avogadro number of helium atom is?

Last Answer : 4.00 gram

Description : Pick out the wrong statement. (A) The ratio of the density of the 'nucleus' to that of the 'atom' is 10 12 (B) α-particle is identical with a doubly charged helium ion (C) The mass of deuterium atom is half that of helium atom (D) Gamma rays are high energy electrons

Last Answer : (D) Gamma rays are high energy electrons

Description : Neutrons have mass approximately equal to that of __________ atoms. (A) Hydrogen (B) Helium (C) Deuterium (D) None of these

Last Answer : (A) Hydrogen

Description : What is the atomic mass of hydrogen ?

Last Answer : Atomic mass of hydrogen 1.

Description : What is the atomic mass of titanium ?

Last Answer : Atomic mass of titanium 48

Description : What is Gram Atomic Mass ?

Last Answer : Gram atomic mass: The amount obtained by expressing the atomic mass of an element in grams is called its one gram-atomic mass ; In modern terms, it is also called a mole atom

Description : What is a Unified Atomic Mass ?

Last Answer : The unit used today for mass on the atomic or molecular scale is the unified atomic mass unit. Whose signal is u . This unit is also called dalton . A unified mass unit is approximately equal to the mass ... many people express the unified atomic mass unit i.e. u with atomic mass unit i.e. amu .

Description : Who gave the idea of the first atomic mass ?

Last Answer : John Dalton gave the idea of the first atomic mass.

Description : What is the atomic mass of Silver ( Ag) ?

Last Answer : Its atomic mass is 106 |

Description : What is the atomic mass of vanadium ?

Last Answer : This is the atomic mass of 51

Description : What is the atomic mass of potassium ?

Last Answer : Atomic mass of potassium 39.0283

Description : The mass number of a nucleus is - (1) always less than its atomic number (2) the sum of the number of protons and neutrons present in the nucleus (3) always more than the atomic weight (4) a fraction

Last Answer : (2) the sum of the number of protons and neutrons present in the nucleus

Description : An atom of an element with mass number 23 and atomic number 11 will have- (1) 11 neutrons, 12 protons and 11 electrons (2) 11 protons, 12 neutrons and 11 electrons (3) 11 protons, 12 electrons and 11 neutrons (4) 23 protons and 11 electrons

Last Answer : (2) 11 protons, 12 neutrons and 11 electrons

Description : What are isobars? (1) Elements with same atomic number but different mass number (2) Elements with different atomic number but same mass number (3) Elements with different atomic number and different mass number (4) Elements with same atomic number and same mass number

Last Answer : (2) Elements with different atomic number but same mass number Explanation: Isobars are atoms of different chemical elements that have the same number of n cleons. Correspondingly, isobars differ in atomic number (number of protons) but have the same mass number.

Description : All isotopes of the same element have (1) different atomic numbers and different atomic mass (2) different atomic numbers and the same atomic mass (3) the same atomic number but different atomic masses (4) the same atomic number and the atomic mass

Last Answer : (3) the same atomic number but different atomic masses Explanation: Isotopes are forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei. So they have the same atomic number, but differ in relative atomic mass.