Energy required to remove a core electron
energy required to remove a valence electron
10)
The element sodium has an atomic number of 11 and a mass number of 23. How many protons, neutrons, and electrons does one
atom contain?
11p. 11e , 12nº
Eliminate
11p*. 12.11n
11pt. 11e, 23°
D)
12p. 12e, 11nº
The atomic number, or
number is the described as the number of
number, is the described as the number of
in the nucleus of an chemical element

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.