Arrange the elements in order of increasing atomic radius. Use the periodic table to help you.
2 answers:
Answer: Order of atomic radius follows:
<u>Explanation:</u>
Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.
As moving from top to bottom, there is an addition of shell around the nucleus and the outermost shell gets far away from the nucleus and hence, the distance between the nucleus and outermost shell increases. Thus, increasing the atomic radii of the atom.
As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.
For the given elements:
Magnesium is present in Group 2, Period 3 of the periodic table.
Barium is present in Group 2, Period 6 of the periodic table.
Fluorine is present in Group 17, Period 2 of the periodic table.
Sulfur is present in Group 16, Period 3 of the periodic table.
The increasing order of atomic radius follows:
You might be interested in
Answer:
Explanation:
We are asked to find how many atoms are in 8.88 grams of silicon.
<h3>1. Grams to Moles </h3>First, we convert grams to moles. We use the molar mass or the mass of 1 mole of a substance. These values are found on the Periodic Table as they are equal to the atomic masses, but the units are grams per mole instead of atomic mass units.
Look up silicon's molar mass.
- Si: 28.085 g/mol
We will convert using dimensional analysis. Set up a conversion factor with the molar mass.
We are converting 8.88 grams of silicon to moles, so we multiply by this value.
Flip the fraction so the units of grams of silicon cancel.
Next, we convert moles to atoms. We use Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of silicon.
Set up another conversion factor.
Multiply by the number of moles we calculated.
The units of moles of silicon cancel.
The original measurement of 8.88 grams has 3 significant figures, so our answer must have the same.
For the number we calculated, that is the hundredth place. The 4 in the thousandth place tells us to leave the 0 in the hundredth place.
<u>8.88 grams of silicon contains 1.90 ×10²³ atoms of silicon.</u>