Test
Unit 2 Questions
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Preguntas del test (49)
1What charge do electrons have?
- A-1
- B0
2What charge will an ion of lithium take?
(group 1)- A1+ (one electron in the outer shell, needs to lose it)
- B1-
3What charge will an ion of beryllium take?
- A2+ (two electrons in the outer shell, needs to lose them both)
- B1+ (one electron in the outer shell, needs to lose it)
4What charge will an ion of barium take?
- A2+ (group 2 so two electrons in the outer shell, needs to lose them both)
- B1+ (one electron in the outer shell, needs to lose it)
5What charge will an ion of fluorine take?
- A2+ (group 2 so two electrons in the outer shell, needs to lose them both)
- B1- (7 electrons in the outer shell, needs to gain one)
6If something has gained electrons, what charge will it have?
- ANegative
- BPositive
7If something has lost electrons, what charge will it have?
- APositive
- BNegative
8What charge will an ion of oxygen take?
- A2- (6 electrons in outer shell so needs to gain two)
- B1- (7 electrons in the outer shell, needs to gain one)
9What charge will an ion of Selenium take?
- A2- (group 6, so has 6 electrons in the outer shell and needs to gain two)
- B2+ (group 2 so two electrons in the outer shell, needs to lose them both)
10Explain in terms of electrons what occurs when lithium bonds with chlorine
- AOne electron transferred from lithium to chlorine
- BTwo electrons transferred from lithium to chlorine
11Why do atoms transfer electrons in ionic bonding?
- ASo that they can have full outer shells
- BSo they can react with Noble Gases
12Explain in terms of electrons what occurs when lithium bonds with fluorine
- AOne electron transferred from lithium to fluorine
- BTwo electrons transferred from lithium to fluorine
13Explain in terms of electrons what occurs when magnesium bonds with oxygen
- ATwo electrons transferred from magnesium to oxygen
- BFIve electrons transferred from magnesium to oxygen
14Explain in terms of electrons what occurs when beryllium bonds with oxygen (3 marks)
- ATwo electrons transferred from beryllium to oxygen
- BFive electrons transferred from beryllium to oxygen
15Explain in terms of electrons what occurs when magnesium bonds with chlorine
- AOne electron transferred from magnesium to two different chlorine atoms
- BTwo electrons transferred from magnesium to two different chlorine atoms
16Explain in terms of electrons what occurs when sodium bonds with oxygen
- ATwo electrons transferred to an oxygen atom from two different sodium atoms
- BThree electrons transferred to an oxygen atom from two different sodium atoms
17Why do sodium ions and chlorine ions form an ionic bond?
- AThere is an electrostatic force of attraction between oppositely charged ions
- BThere is an electrostatic force of attraction between correctly charged ions
18Why don't sulphur ions and oxygen ions form ionic bonds with each other?
- ABoth have negative charges so would repel
- BBoth have positive charges so would repel
19What is the name for a substance made of billions of oppositely charged ions joined together?
- AGiant ionic lattice
- BGiant ionic lettice
20Define giant ionic lattice
- AA huge 3D network of ions
- BA huge 2D network of atoms
21State the melting points of ionic substances
- AHigh
- BLow
22Explain why ionic substances have high melting points.
- AStrong bonds between oppositely charged ions are hard to break
- BStrong bonds between same charged ions are hard to break
23Will NaCl(s) conduct electricity?
- ANo
- BYes
24Will NaCl (aq) conduct electricity?
- AYes (aq stands for aqueous which means it is dissolved in water)
- BNo (aq stands for aqueous which means it is dissolved in water)
25Will NaCl (l) conduct electricity?
- AYes
- BNo
26What does molten mean
- AMelted
- BBurnt
27Explain why ionic compounds do not conduct electricity when solid
- ABecause the ions are not free to move
- BBecuase the ions are bad ions
28Explain why ionic compounds conduct electricity in solution
- ABecuase the ions are free to move
- BBecuase the ions can get a magnet signal
29Explain why ionic compounds conduct electricity when molten
- AThe ions are free to move
- BThe ions can recieve a pull
30What does soluble mean?
- ACan dissolve in water
- BCan be a solvent
31What does insoluble mean?
- ANo dissolve in water
- BDoesn't become a solvent
32Magnesium carbonate is insoluble. What do you need to do before it will conduct electricity?
- AMelt it
- BFreeze it
33Explain why chlorine and fluorine form covalent bonds
- ABoth non metals
- BBoth metals
34Complete the sentence: In covalent bonds, electrons are [blank_start]shared[blank_end]
- Ashared
35In ionic bonds electrons are [blank_start]transferred[blank_end]
- Atransferred
36What is the name given to the structure of diamond, graphite and silicon dioxide?
- Agiant covalent
- Btiny metal
37How many bonds does each carbon have in diamond?
- A4
- B6
38Explain why diamond has a high melting point
- AGiant structure, Strong covalent bonds between the atoms, requires a lot of energy to break
- BGiant structure, Strong covalent bonds between the atoms, requires not a lot of energy to break
39Explain why most giant covalent substances do not conduct electricity (3 marks)
- AThere are no electrons/ions/charged particles that are free to move
- BThere are no electrons/ions/charged particles that able to conduct
40Explain why graphite conducts electricity
- AHas delocalised electrons between the layers that can move through the graphite
- BHas delocalised electrons between the layers that can't move through the graphite
41Explain why graphite can act as a lubricant
- AWeak forces between layers which are free to slide over each other
- BStrong forces between layers which are free to slide over each other
42What is graphine
- AOne layer of graphite
- BTwo layers of graphite
43What is a fullerene?
- ASubstance made of carbon atoms arranged in a cage
- BSubstance made of carbon atoms arranged in a box
44What type of substance are methane and water?
- ASimple molecular (or simple molecules)
- BComplex molecular (or hard molecules)
45What is a molecule?
- AA group of atoms chemically bonded together
- BA group of atoms not chemically bonded together
46Describe the structure of simple covalent molecules
- AStrong covalent bonds between atoms, weak forces holding the molecules together
- BWeak covalent bonds between atoms, weak forces holding the molecules together
47What are intermolecular forces?
- AWeak forces between molecules which hold them together
- BStrong forces between molecules which hold them together
48explain y methane has low melt point
- AIt is a simple molecular substance with weak forces between the molecules (which are easy to break)
- BIt is a covalent bond
49What is polymer
- AMillions of small molecules joined together in a chain to form a large molecule
- B10 small molecules joined together in a chain to form a bigger molecule
Información
- Descripción
- Test sobre Unit 2 Questions, creado por William , el 19/01/2019.
- Autor
- William ,
- Idioma
- English
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