Atomic structure and the periodic table

This question is about atoms. Atoms contain three types of particle: electrons, neutrons, and protons. Which particle has no electrical charge?

Which particles have the same relative mass?

An atom of element Z contains 3 electrons and 3 protons. Give the name of element Z. Use the periodic table.

An atom of element Z contains: 3 electrons, 4 neutrons, 3 protons. Complete the diagram to show the position of the particles in an atom of element Z. Use the symbols: × = electron, ● = neutron, ○ = proton.

This question is about carbon. Which type of substance is carbon?

Carbon has isotopes with mass numbers 12, 13 and 14. Complete the sentences. Choose answers from the box.\n\n[electrons, ions, molecules, neutrons, protons]\n\nThe isotopes of carbon have the same number of ______.\nThe isotopes of carbon have a different number of ______.

This question is about metals. Platinum is used to make jewellery. Suggest one reason why platinum is used to make jewellery.

Copper is a transition element. Sodium is a Group 1 element. What are two differences between copper and sodium? Select two options. <br/><br/> Copper has a lower melting point. <br/> Copper is harder. <br/> Copper is less dense. <br/> Copper is less reactive. <br/> Copper is less strong. <br/>

The metals aluminium and copper can be used to make pans for cooking. Table 2 shows information about the two metals. The higher the value for thermal conductivity, the better the metal conducts thermal energy. Evaluate the use of pans made of aluminium and of copper. Use Table 2. <br/><br/> <table border="1" cellpadding="10" cellspacing="0" style="border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; border: 2px solid black;"> <caption style="font-weight: bold; font-size: 16px; margin-bottom: 10px;">Table 2</caption> <tr> <th style="border: 1px solid black; padding: 10px; background-color: #f0f0f0;"></th> <th style="border: 1px solid black; padding: 10px; text-align: center; font-weight: bold; background-color: #f0f0f0;">Aluminium</th> <th style="border: 1px solid black; padding: 10px; text-align: center; font-weight: bold; background-color: #f0f0f0;">Copper</th> </tr> <tr> <td style="border: 1px solid black; padding: 10px; font-weight: bold;">Thermal conductivity in<br/>arbitrary units</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">250</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">400</td> </tr> <tr> <td style="border: 1px solid black; padding: 10px; font-weight: bold;">Density in g/cm³</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">2.7</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">8.9</td> </tr> <tr> <td style="border: 1px solid black; padding: 10px; font-weight: bold;">Cost of metal per kg in £</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">1.50</td> <td style="border: 1px solid black; padding: 10px; text-align: center;">7.00</td> </tr> </table>

Discoveries in chemistry led to a better understanding of atomic structure. Atoms were originally thought to be tiny spheres that could not be divided. The plum pudding model of the atom was then developed. Figure 10 represents the plum pudding model of the atom. Describe the plum pudding model of the atom.

Atoms contain electrons, neutrons and protons. Write these three particles in order of their discovery.\n\nEarliest ______\n______\nLatest ______

Very few atoms of the element tennessine (Ts) have ever been identified. The atomic number of tennessine is 117. Predict the number of outer shell electrons in an atom of tennessine. Give one reason for your answer. Use the periodic table.

Tennessine was first identified by a small group of scientists in 2010. Suggest one reason why tennessine was not accepted as a new element by other scientists until 2015.

This question is about the periodic table. Sodium and potassium are in Group 1 of the periodic table. Give one similarity and one difference between the electronic structures of sodium and potassium. Similarity: Difference:

Group 1 elements react with water. Give two observations made when potassium reacts with water.

Potassium hydroxide solution is produced when potassium reacts with water. What is the colour of universal indicator when added to potassium hydroxide solution? Give one reason for your answer. Colour of universal indicator: Reason:

Table 1 shows the densities of some of the elements in Group 0 of the periodic table. Plot the data from Table 1 on Figure 1. <br/><br/> <table border="1" cellpadding="12" cellspacing="0" style="border-collapse: collapse; font-family: Arial, sans-serif; font-size: 15px; border: 2px solid black;"> <caption style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">Table 1</caption> <tr> <th style="border: 1px solid black; padding: 12px; text-align: left; font-weight: bold;">Element</th> <th style="border: 1px solid black; padding: 12px; text-align: center; font-weight: bold;">Atomic number</th> <th style="border: 1px solid black; padding: 12px; text-align: center; font-weight: bold;">Density in mg/cm³</th> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Helium</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">2</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">0.2</td> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Neon</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">10</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">0.8</td> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Argon</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">18</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">1.6</td> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Krypton</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">36</td> <td style="border: 1px solid black; padding: 12px; text-align: center; font-weight: bold;">X</td> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Xenon</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">54</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">5.4</td> </tr> <tr> <td style="border: 1px solid black; padding: 12px;">Radon</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">86</td> <td style="border: 1px solid black; padding: 12px; text-align: center;">9.1</td> </tr> </table>

Estimate the density (X) of krypton. Use your plotted graph and Table 1.

The elements in Group 7 are called the halogens. A more reactive halogen can displace a less reactive halogen from a solution of its salt. Which combination of solutions will produce a reaction when mixed?

Which of the following describes the trends going down Group 7?

This question is about models of the atom. Figure 2 shows two early models of the atom. Name the models of the atom shown in Figure 2. Model A: Model B:

Compare model A with the model of the atom used today. Use Figure 2.

Chadwick's experiments showed the existence of neutrons in an atom. This led to an understanding of isotopes. Define the term 'isotopes'. Refer to subatomic particles in your answer.

A calcium atom is larger than a magnesium atom. Explain why calcium reacts more vigorously than magnesium with hydrochloric acid of the same concentration.