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C1 Atoms, ions and rates - End of unit exam

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Last updated about 2 years ago
29 questions
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Question 1
1.

What does the atomic number of an atom represent?

Question 2
2.

What does the mass number of an atom represent?

Question 3
3.

Match the descriptions to the sub atomic particles. Some may be used more than once.

  • Found in Nucleus
  • Found outside nucleus
  • Negatively charged -1
  • Positively charged +1
  • No charge
  • Relative Mass of 1
  • Negligible mass
  • Proton
  • Neutron
  • Electron
Question 4
4.

Give a definition of isotope

Question 5
5.

Describe how the electron configuration of an atom changes when it becomes an ion.

Question 6
6.

Given that Silver contains 52% of Ag-107 with a mass of 107 amu and 48% of Ag-109 with a mass of 109 amu, calculate the relative atomic mass.

Question 7
7.

The naturally occurring copper consists of Cu-63 (69% abundance and mass of 63) and Cu-65 (31% abundance and mass of 65 amu). Calculate the relative atomic mass.

Question 8
8.

When forming ions metals normally form...

Question 9
9.

When forming ions non-metals normally form...

Question 10
10.

What is necessary for a collision to lead to a chemical reaction based on the collision theory?

Question 11
11.

In an experiment studying reaction rates, temperature is increased. What is the role of temperature in this experiment?

Question 12
12.

In a study about the effect of temperature on the solubility of sodium chloride, what role does the amount of dissolved sodium chloride play?

Question 13
13.

Draw the electron configuration of an nitrogen ion

Question 14
14.

Draw the electron configuration of a lithium atom

Question 15
15.

Draw the electron configuration of an aluminium ion

Question 16
16.

Describe the meaning of activation energy

Question 17
17.

What happens when particles collide with less than activation energy?

Question 18
18.
The charge of an aluminium ion _______
The charge of an sulphur ion _______
The charge of a hydrogen ion_______
The charge of a sodium ion_______
The charge of a calcium ion_______
The charge of a florine ion_______
The charge of a nitrogen ion_______
Question 19
19.

What is the charge of an ion with 10 protons and 7 electrons?

Question 20
20.

What is the atomic mass of an atom with 12 protons, 13 neutrons and 11 electrons?

Question 21
21.

What happens to the number of atoms in a chemical reaction?

Question 22
22.

Which factor increases the rate of a chemical reaction?

Question 23
23.

Explain why increasing surface area of a solid reactant increases the rate of a reaction

Question 24
24.

Explain why atoms have no overall charge

Question 25
25.

Explain the effect of increasing temperature on the rate of a reaction

Question 26
26.

Which of the following will not increase the rate of reaction?

Question 27
27.

1. A reaction produces 120g of water in 15 minutes. What is the rate of reaction?

Question 28
28.

2. If 200g of hydrogen reacts in 60 minutes, what is the average rate of reaction?

Question 29
29.

Describe the effect of increasing the concentration of a solution on rate of reaction