WorksheetsAtoms and Nuclear Chemistry Review
Total questions: 25
Worksheet time: 30mins
Visible light with a wavelength of 6.3 x 10-7 m is what color?
Red
Orange
Green
Violet
When an electron falls from n = 3 to n = 2, what wavelength of energy is emitted?
1875 nm
103 nm
656 nm
97 nm
What type of energy is emitted when electrons relax from n = 6 to n = 3?
Gamma
Ultraviolet
Visible
Infrared
How many neutrons are in an atom of Pb-212?
212
207
130
82
Which type of energy has the highest frequency?
radio waves
microwaves
visible light
gamma rays
Which is the correct order of radiation in order from least harmful to most harmful?
gamma, beta, alpha
beta, alpha, gamma
alpha, beta, gamma
gamma, alpha, beta
What is the atomic number of Th-240?
240
232
150
90
Radium-230 undergoes alpha decay. What element is formed?
Radium-226
Radon-230
Radon-226
Radon-222
When Ac-228 undergoes beta decay, what element is formed?
Ac-228
Th-228
Ra-228
Fr-288
If you have 10 g of a radioactive substance, and it goes through two half-lives, how much remains?
10 g
5 g
2.5 g
1.25 g
A radioactive element has a half-life of 10 minutes. 30 minutes have passed. How much of a 80 g sample remains?
80 g
40 g
20 g
10 g
Which statement correctly differentiates between nuclear fission and nuclear fusion?
Both join atoms together.
Both split atoms apart.
Fusion splits atoms and fission joins atoms.
Fusion joins atoms and fission splits atoms.
Which family on the periodic table has elements whose electron configurations end in p4?
4
6
14
16
How many electrons will a d-orbital hold?
2
6
10
14
What element has this electron configuration? 1s22s22p63s1?
Lithium
Sodium
Magnesium
Chlorine
What is the correct electron configuration for Titanium?
1s22s22p63s23p64s23d4
1s22s22p63s23p64s23d2
1s22s22p63s23p64s24p2
1s22s22p63s23p64s24p4
What element has this electron configuration? [Kr]5s24d105p2?
Sr
Zr
Sn
Ra
Which rule does this image violate?
Pauli Exclusion Principle
Hund's Rule
Aufbau Principle
Which rule does this image violate?
Pauli Exclusion Principle
Hund's Rule
Aufbau Principle
This is the electron configuration for what element? 1s2s222p63s23p64s23d7
Cobalt
Rhodium
Sulfur
Magnesium
How many valence electrons does an atom of iodine have?
7
17
1
11
What is the charge on an atom of sulfur when it ionizes?
+2
-2
+6
-6
How many electrons would be shown on the Lewis dot diagram for selenium?
2
3
4
6
What is the charge on a calcium ion?
+2
+6
-2
-6
What is the charge of a phosphorus ion?
+3
-3
+5
-5
