What is the atomic mass of iodine?

What is the atomic mass of iodine?

126.90447 uIodine / Atomic mass

What is the atomic mass of bromine?

79.904 uBromine / Atomic mass
3. Bromine has two naturally occurring isotopes (Br-79 and Br-81) and an atomic mass of 79.904 amu.

Is iodine and bromine the same?

Summary – Bromine vs Iodine Bromine and iodine are halides; in other words, they are chemical elements found in group 17 of the periodic table of elements. The key difference between bromine and iodine is that bromine is a liquid at room temperature while iodine is a solid at room temperature.

Why is chlorine bromine and iodine is triad?

Chlorine has atomic mass 35.5 and iodine has atomic mass 126.9. Predict the atomic mass of bromine. Hint: Dobereiner’s triads and Newland’s law of octaves were early attempts at classifying Dobereiner arranged the element in increasing order of atomic masses.

What is the molecular mass of i2?

253.80895
Iodine is an element with atomic symbol I, atomic number 53, and atomic weight of 126.90….3.1Computed Properties.

Is i2 or br2 more reactive?

This makes it easier for bromine to gain an electron to the outer shell when compared to iodine. Therefore, bromine is more reactive than iodine.

Why is bromine more reactive than iodine although both lie in the same group?

For bromine or iodine to react, each atom needs to gain an electron to fill up its shell so that it is in a more stable state. Since bromine has fewer shells, its outer shell is closer to the nucleus so, there is a stronger force of attraction of the positively charged nucleus on the outer shell of electrons.

What is dobereiner triad rule?

Dobereiner stated in his law of triads that the arithmetic mean of the atomic masses of the first and third element in a triad would be approximately equal to the atomic mass of the second element in that triad.

What is the atomic mass of chlorine and bromine?

Solution : As chlorine (CI), bromine (Br) and iodine (I) form a triad, atomic mass of Br should be the mean of atomic masses of CI and I . `therefore` Atomic mass of Br` = (35.5+126.9)/(2)=81.2` `therefore` Atomic mass of Br would be approximately 81 (actual mass is 79.9).

How many atoms are in 1 mole of iodine?

Notice that each iodine molecule contains 2 atoms of iodine, 2×I , which means that 1 mole of iodine molecules contains 2 moles of iodine atoms.

Is iodine larger than bromine?

Also, the elements in the same column as they move down closer to the bottom of the table, the radius gets larger. For example, if you look at the two elements: Iodine and Bromine, out of the two elements Iodine would have the larger radius because it is located below Bromine on the periodic table.

Why is the reactivity of iodine lower than that of bromine?

Iodine has 5 shells whereas bromine has 4 shells. Since bromine has less number of shells, the outer shell is closer to the nucleus and there is a strong force of attraction between the positive charge of the nucleus and the electrons in the outermost shell.

How many elements were discovered at the time of Newland?

Newland gave Newlands law of octaves- When elements are arranged in increasing order to atomic masses, then every eighth element has the similar properties to that of the first element. Newland was among the first one to start classification on the basis of atomic weight. Thus the correct option is (D) 56.

What is the atomic mass of halogens?

Chemistry