Atomic structure

9.Match each subatomic particle with its relative charge.

10.Arrange the following particles in order of increasing mass (lightest to heaviest).

11.Which of the following statements about atoms are true? (Select all that apply)

12.An atom that has gained an electron is called a cation.

13.In Dalton's law of multiple proportions, the ratio of oxygen masses combining with a fixed mass of tin in grey tin oxide and white tin oxide is 1:2. What is the ratio of oxygen atoms per tin atom in these two compounds?

14.The diagram shows a Bohr model of a sodium atom. How many electrons are in the outermost shell?

15.Which of the following are correct statements about the distribution of mass and charge in an atom? (Select all that apply)

16.Match each historical figure or concept with their contribution to atomic theory.

17.Arrange the following substances in order of increasing number of oxygen atoms per nitrogen atom: N2O, NO, NO2.

18.A sample of tin oxide is found to contain 88.1% tin and 11.9% oxygen by mass. Using the law of multiple proportions, what is the likely formula of this oxide?

19.Nitrous oxide (N2O) contains 63.3% nitrogen and 36.7% oxygen. Nitric oxide (NO) contains 44.05% nitrogen and 55.95% oxygen. What is the ratio of oxygen masses combining with a fixed mass of nitrogen in N2O : NO?

20.Which of the following statements about Dalton's law of multiple proportions are correct? (Select all that apply)

21.In the Bohr model of a sodium atom (atomic number 11), how many electrons are in the second shell?

22.The diagram shows a Bohr model of a sodium atom. Which part of the atom contains most of its mass?

23.Match each named compound with its chemical formula.

24.An atom with more protons than electrons is a negative ion.

25.A sample of iron(II) oxide (FeO) is found to contain 77.7% iron by mass. What is the approximate percentage of iron in iron(III) oxide (Fe2O3)? (Atomic masses: Fe = 55.8, O = 16.0)

26.Arrange the following compounds in order of increasing oxygen content per nitrogen atom (lowest to highest): N2O, NO, NO2.

27.In an experiment to determine the composition of tin oxides, a student heats a known mass of tin in air and measures the mass of the product. The grey oxide contains 88.1% tin and 11.9% oxygen. In a separate experiment, the white oxide is found to contain 78.7% tin and 21.3% oxygen. Which of the following ratios of oxygen mass per 100 g of tin best supports Dalton's law of multiple proportions for these two oxides?

28.Match each tin oxide to its formula based on the law of multiple proportions data: grey oxide (88.1% Sn, 11.9% O) and white oxide (78.7% Sn, 21.3% O).

29.Arrange the following nitrogen oxides in order of increasing oxygen content per fixed mass of nitrogen (lowest to highest): N2O, NO, NO2.

30.In Dalton's law of multiple proportions, the ratio of oxygen masses combining with a fixed mass of tin in grey tin oxide and white tin oxide is 2:1.

31.A student performs an experiment to determine the formula of an oxide of nitrogen. They react 14.0 g of nitrogen with excess oxygen and obtain 30.0 g of the oxide. Which of the following is the most likely formula of the oxide? (Atomic masses: N = 14, O = 16)

32.Which subatomic particle has no charge?

33.What is the approximate relative mass of an electron compared to a proton?

34.The nucleus of an atom contains protons, neutrons, and electrons.

35.Which of the following best describes the distribution of mass in an atom?

36.Isotopes of an element have the same number of protons but different numbers of neutrons.

37.Arrange the following particles in order of increasing mass (lightest to heaviest):

38.Which of the following statements about ions are correct? (Select all that apply)

39.The diagram shows a Bohr model of a sodium atom. The particle labelled 'X' in the nucleus is a neutron.

40.Arrange the following in order of increasing mass (lightest to heaviest): proton, neutron, electron.

41.Complete the sentence:

42.An atom has 11 protons and 12 neutrons. What is its atomic number?

43.What is the term for a charged atom?

44.An atom of carbon has 6 protons and 6 neutrons. What is its mass number?

45.Complete the sentence about isotopes.

46.In an experiment, a sample of iron oxide is 78.1% iron and 21.9% oxygen by mass. Calculate the mass of oxygen combined with 100 g of iron. Give your answer to one decimal place.

47.Refer to the diagram of a sodium atom. Complete the sentence: The particle labelled 'X' in the nucleus is a ____.

48.What is the term for atoms of the same element that have different numbers of neutrons?

49.A tin oxide sample is 88.1% tin and 11.9% oxygen by mass. Calculate the mass of oxygen (in g) that combines with 100 g of tin. Give your answer to one decimal place.

50.Complete the sentence about atomic structure.

51.Fill in the blanks to complete the sentence about isotopes.

52.What is the atomic number of an atom that has 11 protons?

53.Explain how the discovery of the electron led to the development of the plum pudding model of the atom.

54.Explain how the law of multiple proportions provided evidence for the existence of atoms.

55.An atom has 11 protons and 12 neutrons. What is its atomic number?

56.An atom of carbon has 6 protons and 6 neutrons. What is its mass number?

57.In an experiment, a sample of iron oxide is 78.1% iron and 21.9% oxygen by mass. Calculate the mass of oxygen combined with 100 g of iron. Give your answer to one decimal place.

58.A tin oxide sample is 88.1% tin and 11.9% oxygen by mass. Calculate the mass of oxygen (in g) that combines with 100 g of tin. Give your answer to one decimal place.