WorksheetsAtomic Structure
Total questions: 25
Worksheet time: 44mins
What does the number of neutrons affect?
Nuclear Charge
Atomic Number
Cations
Atomic Mass
What is the formula used to calculate atomic mass?
Atomic Mass - electrons
Protons + Neutrons
Electrons + Neutrons
Protons + Electrons
What are cations?
What are anions?
Atoms that loose electrons and become more negative
Ions that gain electrons and become more negative
Ions that loose electrons and become more positive
Molecules that gain electrons
How many protons are there in cobalt?
4
32
59
27
How many neutrons and electrons are there in a neutral Ca?
19 electrons and 19 neutrons
20 electrons and 20 neutrons
19 electrons and 20 neutrons
20 electrons and 19 neutrons
What letter represent the atomic number in the diagram below
L
Z
A
X
In an isotope the (a) differs
Complete the table:
The amount of electrons are (a) (only write number)
If the atomic mass of Cl is 35 then what would be the amount of neutrons in Cl-37?
18 protons
17 protons
18 neutrons
20 neutrons
What is the average atomic mass of 69.2% of copper-63 and 30.8 copper-65 if you know that their masses are 62.93 and 64.93 respectively?
What are the percentages of K-39 and K-41 if you know that they weight 38.964 and 40.962 grams respectively?
K-39 = 93.19% and K-41 = 6.81%
K-39 = 6.81% and K-41 = 93.19
K-39 = 7% and K-41 = 94%
K-39 = 10% and K-41 = 94%
What is a nuclear charge?
The positive charge in the nucleus based on the amount of protons
The positive charge in the nucleus based on the amount of neutrons
Negative charge and based on the amount of electrons in the nucleus
Positive charge of electrons
What are the valence electrons of Lithium and Boron respectively?
1 and 3
3 and 5
2 and 6
3 and 2
How many electrons can fit in the 3rd orbital?
19
2
8
18
Is this the correct Bohr's diagram for Beryllium? If no, why?
If nickel have an atomic # of 28 what would happen to its electrons if the charge of nickel was 2+?
It would loose 2 electrons becoming 26
It would gain 2 electrons becoming 30
It would stay the same
It would loose 2 protons becoming 26
What is the nuclear charge of an atom of Krypton?
+84
+49
+36
-49
If Li-6 has a mass of 6.015g and Li-7 of 7.016g what would be their percentages?
Li-6= 7.59% & Li-7= 92.41%
Li-6= 92.41% & Li-7= 7.59%
Li-6= 93% & Li-7= 8%
Select the correct Bohr's Diagram for P
Select 2 choices that would fill in the table
Fe-55= 29 neutrons & a nuclear charge of +26
Fe-56= 30 neutrons & a nuclear charge of +26
Fe-56= 26 neutrons & a nuclear charge of +55
Fe-55= 28 neutrons & a nuclear charge of +55
In this image, how many neutrons does Boron have?
5
11
6
16
How many valence electrons are in Arsenic?
5
33
8
10
Electrons have a very significant effect in the atomic mass
True
False
In neutral atoms the amount of electrons are not the same as the amount of protons
True
False
