Unit 3 Test Review - Electrons

Concept 1

100

Order the electromagnetic spectrum in order from longest wavelength to shortest wavelength.

radio, micro, infrared, visible, ultraviolet, x-rays, gamma rays

200

What is the speed of light?

3.0 x 10⁸ m/s

300

What state are electrons in when they gain energy?

What state do they go to when they emit that extra energy?

excited state;

ground state

400

What is the frequency of a light with a wavelength of 2.45 x 10^-7?

1.22 x 10¹⁵ Hz

500

How much energy does a ray of light have if it has a wavelength of 6.50 x 10^-7?

3.06 x 10^-19 Joules

Concept 2

100

How many electrons can each sublevel hold?

s - 2

p - 6

d - 10

f - 14

200

Which rule says that electrons must fill the lowest energy level first?

Aufbau's Principle

300

Which quantum number tells you the orientation of an orbital around a nucleus?

magnetic quantum number

400

Write the full electron configuration for Bromine (Br).

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

500

Write the noble gas notation for Radon (Rn).

[Xe] 6s²4f¹⁴5d¹⁰6p⁶

Concept 3

100

What law states that as the atomic number increases, the nuclear attraction for e- increases, thus pulling the e- in more tightly to the nucleus?

Coulomb's Law

200

What is it called when electrons in the inner energy levels block the attraction of the nucleus to the valence electrons?

Shielding Effect

300

What are the 3 types of bonds and the electronegativity needed for each?

covalent - <0.5

polar covalent - 0.5-2.0

ionic - >2.0

400

Which of the following has the largest atomic radius?

F, Cl, Na, Cs

Cs

500

Which of the following has the highest reactivity?

O, Na, F, Cl

F