WorksheetsAtomic Structure
Total questions: 74
Worksheet time: 2hrs 38mins
Subatomic particle with a mass of 1 and a positive charge
(a)
Subatomic particle with a mass of 1 and no charge
(a)
Subatomic particle with a mass of 0 and a negative charge
(a)
In the periodic table of the elements, the (a) number gives you the number of protons in the nucleus of the atom.
In the periodic table of the elements, the (a) number gives you the total number of sub-atomic particles in the nucleus of the atom.
the name of forms of an element that have the same number of protons but a different number of neutrons
(a)
the name of forms of an element that have the same number of protons and neutrons, but a different number of electrons
(a)
Name for the columns in the periodic table, that show how many electrons are found in the outer shell of an atom.
(a)
Name for the rows in the periodic table that show you hopw many electron shells are found in the atom
(a)
How many protons does Nitrogen have?
7
8
14
14.01
Which of the labeled structures is a neutron?
a
b
c
Which of the labeled structures is an electron?
a
b
c
If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?
11
12
23
34
An element has 17 protons and 18 neutrons in the nucleus. What is the element's mass number?
17
18
1
35
An element has 17 protons and 18 neutrons in the nucleus. What is the element's mass number?
17
18
1
35
Atoms of the same element with a different number of neutrons
Ion
alloy
Isotope
Quarks
Calculation used to find the number of neutrons in an atom
Mass Number- Atomic Number
Atomic Number - Mass Number
Mass Number - Electrons
protons = electrons = neutrons
How many electrons does helium have?
1
3
2
4
5
In the periodic table of the elements, the (a) number gives you the total number of sub-atomic particles in the nucleus of the atom.
Name for the columns in the periodic table, that show how many electrons are found in the outer shell of an atom.
(a)
The structure of an atom of element X is shown what is element X? (K-CHEMISTRY)
Boron
Carbon
Sodium
Sulfur
If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?
11
12
23
34
The table shows the numbers of protons, neutrons and electrons in particles A to I.State which of the particles A to I: is a noble gas atom
(K-CHEMISTRY)
(a)
Beryllium is a metallic element in Group II ,Give the electronic structure of a beryllium atom
(K-CHEMISTRY)
(a)
The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
mass number
atomic number
ionic charge
isotope weight
How many protons does sulfur have?
32
16
48
12
_____________________ are responsible for bonding.
Neutrons
Protons
Electrons
Valence electrons
What is the atomic mass of Neon?
10
20
30
How many neutrons does calcium have?
20
40
60
0
What is the atomic mass of Arsenic?
33
107
75
Chlorine has atomic number 17 and mass number 35. It has
17 protons, 17 electrons. and 52 neutrons
17 protons, 17 electrons, and 18 neutrons
35 protons, 35 electrons, and 17 neutrons
18 protons, 18 electrons, and 17 neutrons
Atoms mostly consist of (a) space.
A column in the periodic table is called a ?
Period
Group
Row
Tally
What is meant by most abundant isotopes?
The isotopes that is present in the smallest amount
The isotopes that is present in the strangest amount
The isotopes that is present in the largest amount
The isotopes that is present in the mysterious amount
What is the relative atomic mass (Ar) of Carbon?
6
12
18
7
What are the steps for finding the Average Atomic Mass?
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Add
1) % to decimal, 2) write given %, 3)write given mass, 4) Mass x abundance decimal 5) Add
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass divided by abundance decimal 5) Add
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Subtract
Chlorine has two naturally occurring isotopes, Cl-35 and Cl-37, The atomic mass of chlorine is 35.45. Which of these two isotopes of chlorine is more abundant?
Cl-35
Cl-37
Cannot be determined from the information provided.
Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?
20.74 amu
22.56 amu
18.39 amu
24.31
Determine the relative molecular mass of sodium hydrogen phopshate. [ Relative atomic mass Na = 23.0, H= 1.0, P = 31.0, O = 16.0 ]
164.0 amu
142.0 amu
119.0 amu
Determine the relative molecular mass of dichlorine heptoxide. [Relative atomic mass Cl = 35.5, O = 16.0]
183.0 amu
167.0 amu
87.0 amu
The relative molecular mass of XFy and XO2 are 108.1amu and 64.1 amu respectively. Determine the relative atomic mass of X and value of y. (X is not the actual symbol of the element)
X = 32.1 and y = 4
X = 54.1 and y = 6
X = 51.1 and y = 3
Element Y consists of two isotopes 6Y and 7Y with masses 6.015 amu and 7.016 amu respectively. If the percent abundance of 6Y is 7.42%, determine the relative atomic mass of Y.
6.51 amu
6.94 amu
13.38 amu
14.43 amu
The mass of a proton is equal to:
1 amu
112th of the mass of a C – 12 atom
zero
both (a) and (b)
An isotope of hydrogen without neutrons is _____.
Deuterium 1H2
Protium 1H1
Tritium 1T3
Heavy hydrogen 1D2.
Why is the average atomic mass of an element usually not a whole number?
Different isotopes and their relative abundance
The atomic mass is calculated using a complex formula
The atomic mass is rounded to the nearest whole number
The atomic mass is always a whole number
If an element has three isotopes with masses 20 amu, 22 amu, and 24 amu, and their abundances are 10%, 20%, and 70% respectively, what is the average atomic mass of the element?
24.6 amu
22.4 amu
25.8 amu
23.2 amu
If an element has three isotopes with masses 30 amu, 32 amu, and 34 amu, and their abundances are 25%, 50%, and 25% respectively, what is the average atomic mass of the element?
33
35
32
31
The box for an element from the periodic table is shown. Which is the atomic mass?
A
B
C
D
Chlorine has two naturally occurring isotopes, Cl-35 and Cl-37, The atomic mass of chlorine is 35.45. Which of these two isotopes of chlorine is more abundant?
Cl-35
Cl-37
Cannot be determined from the information provided.
