Question

apply it
interpret a team of scientists studying the surface of a new planet discovered
ten new elements. the scientists began studying the individual properties of
the elements when they returned to earth. the first step was to determine the
atomic number and atomic mass of each element, shown in the table. using the
ten elements, construct a row of the periodic table using mendeleevs method
of arrangement. then, using the same elements, construct another row using
moseleys method of arrangement.
analyze did any elements switch places? what other information would be
helpful when arranging the elements into a table?

Explanation:

• Mendeleev's Arrangement: Mendeleev arranged elements by increasing atomic mass. So, we order the elements based on their atomic mass values.
• Moseley's Arrangement: Moseley arranged elements by increasing atomic number. So, we order the elements based on their atomic number values.
• Analysis: By comparing the two arrangements (based on atomic mass and atomic number), we can check for element - position swaps. Additional information like electron - configuration (which relates to chemical properties) would be helpful as the periodic table aims to group elements with similar chemical properties.

Answer:

• Mendeleev's Arrangement (by atomic mass): A (60.4), I (63.1), C (63.4), D (62.7), G (65.0), E (68.2), J (68.3), B (70.4), F (70.9), H (71.2)
• Moseley's Arrangement (by atomic number): A (40), I (41), D (42), C (43), G (44), J (45), E (46), B (47), H (48), F (49)
• Analysis:
• Element Swaps: Elements D (atomic mass 62.7, atomic number 42) and I (atomic mass 63.1, atomic number 41) swap places. Also, elements E (atomic mass 68.2, atomic number 46) and J (atomic mass 68.3, atomic number 45) swap places.
• Helpful Information: Electron - configuration (to understand chemical properties as elements in the same group have similar electron - configurations and chemical properties)