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Compared to a 1.0-gram sample of chlorine gas at standard pressure, a 1.0-gram sample of solid aluminum at standard pressure has*
In the ground state, an atom of each of the elements in Group 2 has a different*
At 298 K and 1 atm, which noble gas has the lowest density?*
Which general trend is found in Period 3 as the elements are considered in order of increasing atomic number?*
Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na to Cl?*
Which property decreases when the elements in Group 17 are considered in order of increasing atomic number?*
Which element has a melting point higher than the melting point of rhenium?*
Which list of elements is arranged in order of increasing electronegativity?*
Which element is a liquid at 1000. K?*
Base your answers to questions 10 on the information below.
The atomic number and corresponding atomic radius of the Period 3 elements are shown in the data table below.
State the general relationship between the atomic number and the atomic radius for the Period 3 elements.*
Base your answers to questions 11 on the information below and on your knowledge of chemistry.
The diagram below represents three elements in Group 13 and three elements in Period 3 and their relative positions on the Periodic Table.
Some elements in the solid phase exist in different forms that vary in their physical properties. For example, at room temperature, red phosphorus has a density of 2.16 g/cm3 and white phosphorus has a density of 1.823 g/cm3.
Consider the Period 3 elements in the diagram in order of increasing atomic number. State the trend in electronegativity for these elements.*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
Periodic trends are observed in the properties of the elements in Period 3 on the Periodic Table. These elements vary in physical properties, such as phase, and in chemical properties, such as their ability to lose or gain electrons during a chemical reaction.
Identify the element in Period 3 that requires the least amount of energy to remove the most loosely held electrons from a mole of gaseous atoms of the element in the ground state.*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
The elements in Group 17 are called halogens. The word “halogen” is derived from Greek and means “salt former.”
State the trend in electronegativity for the halogens as these elements are considered in order of increasing atomic number.*
Base your answers to questions 14 on the information below and on your knowledge of chemistry.
A technician recorded data for two properties of Period 3 elements. The data are shown in the table below.
State the phase of chlorine at 281 K and 101.3 kPa.*
State the general trend in first ionization energy as the elements in Period 3 are considered from left to right.*
