The diagram shows the structure of an atom.
Name the positively charged particles in an atom.
State how the diagram in part a) shows that this atom is neutral.
Give the name of the element containing this atom.
Use the Periodic Table to help you.
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The diagram below shows two different atoms of hydrogen.
Which particle is furthest from the centre of each atom?
| ☐ | A | proton | |
| ☐ | B | electron | |
| ☐ | C | neutron | |
| ☐ | D | nucleus |
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The diagram shows the particles in the atom of an element.
Particle Y is a proton.
What is particle Z?
| ☐ | A | an electron | |
| ☐ | B | a molecule | |
| ☐ | C | a neutron | |
| ☐ | D | a nucleus |
Which of these has the smallest mass?
| ☐ | A | an electron | |
| ☐ | B | a neutron | |
| ☐ | C | a nucleus | |
| ☐ | D | a proton |
What is the mass number of this atom?
| ☐ | A | 4 | |
| ☐ | B | 5 | |
| ☐ | C | 9 | |
| ☐ | D | 13 |
What is the atomic number of the atom in part a)?
| ☐ | A | 4 | |
| ☐ | B | 5 | |
| ☐ | C | 9 | |
| ☐ | D | 13 |
(1)
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1 markThe atomic structure of an unknown element is shown below.
What is the atomic number and mass number for the unknown element?
| ☐ | A | Atomic number = 6 Mass number = 11 | |
| ☐ | B | Atomic number = 5 Mass number = 11 | |
| ☐ | C | Atomic number = 5 Mass number = 6 | |
| ☐ | D | Atomic number = 6 Mass number = 10 |
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The diagram shows the particles in an atom of an element.
The box gives the names of some particles.
Use words from the box to label the diagram.
Give the mass number of this atom.
Complete the sentence about isotopes.
Isotopes are atoms that have the same number of ..............................................................
but have a different number of .............................................................. .
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Which box contains only atoms?
| ☐ | A | ||
| ☐ | B | ||
| ☐ | C | ||
| ☐ | D |
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The diagram shows the electronic configuration of an atom of an element.
| name of the part of this atom labelled Z | |
| number of protons in this atom | |
| number of the group that contains this element | |
| number of the period that contains this element | |
| the charge on the ion formed from this atom |
3 marksThis element has three isotopes.
The table shows the mass number and percentage abundance of each isotope in a sample of this element.
| Mass number | Percentage abundance (%) |
| 24 | 79.2 |
| 25 | 10.0 |
| 26 | 10.8 |
Calculate the relative atomic mass (Ar) of this element.
Give your answer to one decimal place.
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Complete the table to show the relative mass and relative charge of a proton and a neutron.
| Proton | Electron | Neutron | |
| Relative mass | 1/2000 | ||
| Relative charge | –1 |
8 marksMagnesium has three isotopes.
1 markThe equation for the reaction between magnesium and oxygen is
Determine the maximum amount, in moles, of magnesium oxide that can be produced from 0.50 mol of magnesium and 0.20 mol of oxygen.
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State the meaning of the term atomic number.
3 marksAn atom of element X contains 14 protons, 14 electrons and 15 neutrons.
| ☐ | A | 14 | |
| ☐ | B | 15 | |
| ☐ | C | 28 | |
| ☐ | D | 29 |
3 marksThe table shows the composition of a sample of a different element, Y, containing three isotopes.
| Mass number of isotope | Percentage of isotope in sample |
| 32 | 95.0 |
| 33 | 0.75 |
| 34 | 4.25 |
Using information from the table, calculate the relative atomic mass (Ar) of this sample of element Y.
Give your answer to one decimal place.
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The diagram represents an atom of boron.
Use information from the diagram to complete the table.
The first row has been done for you.
| atomic number | 5 |
| mass number | |
| number of neutrons | |
| group in the Periodic Table that contains boron | |
| period in the Periodic Table that contains boron | |
| electronic configuration of an atom of boron |
2 marksBoron has two isotopes, boron-10 and boron-11.
A sample of boron contains 18.7% of boron-10 and 81.3% of boron-11.
Calculate the relative atomic mass of this sample of boron.
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This question is about atomic structure.
A group of students looks at the diagram below showing the arrangement of electrons in a chemical substance.
The students make the following incorrect or incomplete conclusions:
Explain how students 1 and 2 could combine their ideas to produce one possible correct conclusion with an appropriate justification.
Evaluate student 1's suggestions of fluorine and sodium.
Correct student 3's statement. Explain your reasoning.
The students are told that the diagram represents format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2210%22%20text-anchor%3D%22middle%22%20x%3D%225.5%22%20y%3D%2221%22%3E12%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2210%22%20text-anchor%3D%22middle%22%20x%3D%225.5%22%20y%3D%2210%22%3E25%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2214%22%20text-anchor%3D%22middle%22%20x%3D%2221.5%22%20y%3D%2216%22%3EMg%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2210%22%20text-anchor%3D%22middle%22%20x%3D%2234.5%22%20y%3D%2210%22%3E2%3C%2Ftext%3E%3Ctext%20font-family%3D%22math117e62166fc8586dfa4d1bc0e17%22%20font-size%3D%2210%22%20text-anchor%3D%22middle%22%20x%3D%2241.5%22%20y%3D%2210%22%3E%2B%3C%2Ftext%3E%3C%2Fsvg%3E)
.
Describe the additions that should be made to the diagram to show this.
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The diagram below shows two different atoms of hydrogen.
Which particle is missing from one of the diagrams?
| ☐ | A | electron | |
| ☐ | B | proton | |
| ☐ | C | neutron | |
| ☐ | D | nucleus |
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1 markThe table shows information about the two isotopes of boron.
| Isotope | Number of protons | Number of neutrons | Percentage isotope in sample |
| 1 | 5 | 5 | 19 |
| 2 | 5 | 6 | 81 |
The relative atomic mass of this sample of boron is:
| ☐ | A | 10.1 | |
| ☐ | B | 10.8 | |
| ☐ | C | 11.5 | |
| ☐ | D | 11.8 |
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The diagram shows an atom of an element.
(1)
| ☐ | A | electron | |
| ☐ | B | ion | |
| ☐ | C | neutron | |
| ☐ | D | proton |
(1)
(1)
There are two isotopes of this element.
Give one way, in terms of sub-atomic particles, that these isotopes are the same and one way that they are different.
same ..........................................................................................................................................
..........................................................................................................................................
different .............................................................................................................................
..........................................................................................................................................
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Thallium, Tl, is an element in Group 3 and Period 6 of the Periodic Table.
The atomic number of thallium is 81
How many electrons are there in the outer shell of an atom of thallium?
| ☐ | A | 3 | |
| ☐ | B | 6 | |
| ☐ | C | 13 | |
| ☐ | D | 81 |
A thallium ion has a charge of 3+
How many electrons are there in this thallium ion?
| ☐ | A | 3 | |
| ☐ | B | 78 | |
| ☐ | C | 81 | |
| ☐ | D | 84 |
5 marksA sample of thallium contains two isotopes.
The table shows the mass number and percentage abundance of each isotope in the sample.
| Isotope | Mass number | Percentage abundance (%) |
| thallium-203 | 203 | 30.80 |
| thallium-205 | 205 | 69.20 |
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Table 1 gives some information about three subatomic particles.
| Subatomic particle | Relative mass | Relative charge |
| electron | 0.0005 | |
| proton | +1 | |
| neutron | 1 |
Table 2 shows the numbers of protons, neutrons and electrons in the species U, V, W, X, Y and Z.
| Species | Number of protons | Number of neutrons | Number of electrons |
| U | 8 | 10 | 8 |
| V | 9 | 10 | 10 |
| W | 11 | 12 | 10 |
| X | 11 | 12 | 11 |
| Y | 12 | 12 | 12 |
| Z | 12 | 13 | 12 |
Use the information in Table 2 to answer these questions.
Each species may be used once, more than once or not at all.
3 marksA sample of neon contains two isotopes, 20Ne and 22Ne
The relative abundances of the two isotopes in the sample are
Calculate the relative atomic mass of this sample of neon.
Give your answer to one decimal place.
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