Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
IGCSE CHEMISTRY
CHAPTER 3
| Question | Answer |
|---|---|
| An aluminium atom has a nucloen number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain? | 14 |
| An atom of element Q contains 19 electrons, 19 protons and 20 neutrons. What is Q | Potassium |
| Name one statement about atoms? | Protons are positively changed |
| The relative atomic mass of chlorine is 35.5. When calculating relative atomic mass, which particle is the mass of a chlorine atom compared to? | An atom of carbon -12 |
| Atoms contain electrons, neutrons and protons. What is the definition of nucleon numbers? | The total number of neutrons and protons in the nucleus of an atom. |
| Name one statement comparing the properties of electrons, neutrons and protons? | Neutrons and protons are both heavier than electrons. |
| What is different for isotopes of the same element? | Nucleon number |
| The nucleon number of an isotope of rubidium is 85. How many protons, neutrons and electrons are present in an atom of this isotope? | 39 Protons, 46 Neutrons 37 electrons |
| Which atom has two more electrons than an atom of a noble gas? | Calcium |
| Which numbers are added together to give the nucleon number of an ion? | Number of protons + number of neutrons |
| Define the term isotope? | Atoms of the same elements with different numbers of neutrons |
| Explain why the two isotopes of bromine have the same chemical properties? | Both have the same number of electrons in the outer shell |
| Define the term atomic number? | Number of protons in one atom of an element |
| Define the term nucleon number? | Number of protons and neutrons in one atom of an element. |
| Define the term element? | Substances that cannot be broken down into anything simpler |
| State two uses of radioactive isotopes? | Treating cancer or radiotherapy Biological tracer |
| Define the term Isotope? Name 3 points. | Atoms of the same element. Atoms with same proton numbers Atoms with same atomic numbers |
| An element M has the electron distribution 2 + 8 + 18 + 3. Which group in the periodic table is element M likely to be in? | Group 3 |
| An element M has the electron distribution 2 + 8 + 18 + 3. Predict whether element M is a poor or a good conductor of electricity. Give a reason for your answer? | Good conductor because it is metal and has delocalised free electrons |
| An element M has the electron distribution 2 + 8 + 18 + 3. Binary compounds contain two atoms per molecule, for example HC. Identify an element which could form a binary compound with element M | N |
| An element M has the electron distribution 2 + 8 + 18 + 3. The hydroxide of M is a white powder which is insoluble in water. Describe in 3 points how you could show that this hydroxide is amphoteric. | It will dissolves in a named strong acid and alkali. It shows both basic and acid properties It reacts with both acids and bases of alkalis |
| Name an element which is used as a fuel in nuclear reactors? | Uranium |
| Name an element which is the only non-metal which is a good conductor of electricity? | Carbon |
| Name an element which inert electrodes are made from this metal? | Platinum |
| Name an element which the gaseous element is used to fill balloons in preference to hydrogen? | Helium |
| Name an element which can form an ion of the type X³- | Nitrogen |
| Name an element that has the same electron as the Calsium ion, Ca²+ | Argon |
| Name an element that is a Period 5 and Group VI | Tellurium |
| Define the term diatomic? | Two atoms per molecule |
| What do the electron distributions of the halogens have in common? Name 2 points. | Same number of outer electrons Need to gain one electron |
| How do their electron distributions differ? Name 2 points. | Different number of energy levels Different number of electrons |
| Three of the halogens in Group VII, Chlorine, Bromine and Iodine. How does their colour change down the Group? | It become darker |
| Three of the halogens in Group VII, Chlorine, Bromine and Iodine. How do their melting points and boiling points change down the group? | It increase |
| What happens when a bond is formed between a green gaseous element and a soft metallic element? | The gas atoms gain an electron |
| Name one statement about solder? | It contains a mixture of lead and tin |
| Which name is given to mixtures of metals? | Alloys |
| Lithium is in Group I and Nitrogen is in Group V of the Periodic Table. Lithium reacts with nitrogen to form the ionic compound lithium nitride. What happens to the electrons when lithium atoms and nitrogen atoms form ions? | Each Lithium atoms loses one electron to form a Li* ion and each nitrogen atom gains three electrons to form an N³ ion |
| Potassium K forms a compound with fluorine F. Name 3 statements about this compound. | The compound is ionic The formula of the compound is KF The compound is soluble in water |
| Compound X melts at 801°C and is a good electrical conductor when dissolved in water. Compound Y boils at 77°C, is insoluble in water and is a non-conductor of electricity. Which type of bonding is present in X and in Y? | X - Ionic Y - Covalent |
| Q+ is an ion of element Q. What has the highest value in the ion? | The nucleon number |
| Which 3 substance is an ionic compound? | Volatility is low Electrical conductivity when molten is good Solubility in water is soluble |
| Sodium chloride is an ionic solid. Name 3 statements of Sodium chloride? | Ions are formed when atoms lose or gain electrons Ions in sodium Chloride are strongly held together Sodium chloride solution can conduct electricity |
| Which change to an atom occurs when it forms a positive ion? | It loses electrons |
| Diamond and graphite are macromolecules. Name 3 statements about diamonds and graphite? | They are giant structures with high melting points They contain only atoms of a non-metal They have covalent bonds between atoms |
| Rescuers are drilling through fallen rocks in order to rescue some men trapped in a cave. The drill needs lubricants from time to time. Name 2 statements about the materials used for the drill tip and the lubricant and the reason for their use. | Diamond was used for the drill tip as it is very hard Graphite was used as the lubricant as it is soft and flaky |
| Graphite is a form of carbon. Why can graphite be used as a lubricant? | Graphite has weak forces of attraction between layers so they can move |
| The lead in a pencil is made of a mixture of graphite and clay. When the percentage of graphite is increased, the pencil slides across the paper more easily. What is the explanation for that. | Graphite is a lubricant |
| Name one statement about diamond and graphite? | They are different solid forms of the same elements. |
| Explain why diamond is a very hard substance? Name 3 points. | Macromolecular Giant covalent Giant atomic |
| Give one use of diamond? | Jewellery |
Created by:
Haridus Academy