Metal usually donates electrons. The concept behind this phenomenon is stability. The elements with the most stable electronic configuration are the noble gases in Group 5A. As a result, the other elements donate or accept electrons so that they would be like the noble gases. Since metals are past their nearest noble gas element, they have to shed their electrons. When they do, they become cations which are positively charged ions.
Answer: A pattern that appears on the periodic table
APEX approved
Answer:
47.74 g
Explanation:
Given data:
Formula units of SrF₂ = 2.31 ×0²³
Mass of SrF₂ = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ formula units
2.31 ×0²³formula units × 1 mol / 6.022 × 10²³ formula units
0.38 mol
Mass of SrF₂:
Mass = number of moles × molar mass
Mass = 0.38 mol × 125.62 g/mol
Mass = 47.74 g