Does any element with Z ≤ 92 match the description? An element in period 3 and group 8A.

Consider the following selected postulates of Dalton's atomic theory: (i) Each element is composed of extremely small particles called atoms. (ii) Atoms are indivisible. (iii) Atoms of a given element are identical. (iv) Atoms of different elements are different and have different properties. Which of the postulates is(are) no longer valid?   A. (i) and (ii) B. (ii) only C. (ii) and (iii) D. (iii) and (iv)

How do we solve this step by step?

Does any element with Z ≤ 92 match the description? A halogen with a higher atomic number than tin.

Does any element with Z ≤ 92 match the description? An element in period 6 and group 6A.

description An element in Period 3 and Group 4A. A semimetal in Group 8A. An element in the nitrogen family with a higher atomic number than argon. A main-group element in Period 3. Does any element with Z ≤ 92 match the description? Yes Yes Yes Yes No No No NO If you checked yes, give the symbol of an element with Z ≤ 92 that matches. 0 0 0

Does any element with Z ≤ 92 match the description? An transition element in period 6.

Rank the masses of the elements from lightest to heaviest. To rank items as equivalent, overlap them. B, Cr, Li, Pb, Ca, Cu, O, Al, I, Mg

A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar System. Mass-spectroscopic analysis produced the following data on the isotopes of molybdenum in these samples: mass relative isotope (amu) abundance 94 Mo 93.9 90.5% 95. Mo 94.9 9.5% Use these measurements to complete the entry for molybdenum in the Periodic Table that would be used on 98765 ALEKS. Be sure your answers have the correct number of significant digits. Caution: your correct answer will have the same format but not necessarily the same numbers as the entry for molybdenum in the Periodic Table we use here on Earth. Мо 23 MacBook Air 888 I. %23 %24 4 5 6 E R T. Y

How can iodine (Z=53) have a higher atomic number yet alower atomic mass than tellurium (Z=52)?