If the electron configuration of magnesium is (2.8, 2], what is the electron configuration of the element before it on the periodic table? (1 point)
[2.8,5)
O [2.8.1)
[2.8, 3]
[2.8)

What is the subscript for oxygen in its molecular formula

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159