Use the periodic to fill in the numbers in the electron configurations shown below. Na: 1822sC2pP3sE C =
D =
E =

Values of the electron configuration of Na:

C=2

D=6

E=1

Given

The electron configuration of Na

Required

Fill the number in the electron configuration

Solution

Sodium with the symbol Na is an alkaline metal located in group 1 and has the atomic number 11.

Electron configuration is based on the number of electrons.

Because the atomic number of Na is 11, the number of protons = the number of electrons for the element Na is 11

So the electron configuration is:

1s² 2s²2p⁶3s¹

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.