Which of the following represents a pair of isotopes? Atomic Number | Mass Number 1. 6| 14 A II. 7| 14 1. 617 B II. 14 | 14 1. 6| 14 II. 14 | 28 I. 7 | 13 D II. 7 | 14 1. 8 10 II. 16 20

Complete the following table by filling in the missing information in each blank. Please only type in numbers Element Symbol Protons Neutrons Electrons Mass Number Mg 12 25 Xe 78 Fe3+ 30 BiS+ 83 209 68 68 167 (type in correct symbol for this one) Tch 米 f8 f12 10 fg 144 fo

Complete the following table. Isotopic Atomic Number Mass Number # protons # neutrons # electrons Notation |210 At¯ 85 52 Cr2+ 24 122 Sh4+ 51

Copper has two stable isotopes with the following atomic masses: copper-63 (atomic mass = 62.9296 amu) and copper-65 (atomic mass = 64.9278 amu). If the average atomic mass of copper is 63.546 amu, calculate the relative abundance of each isotope.

There are only two naturally-occuring stable isotopes of chlorine. The mass and natural abundance of one of them is listed in the table below. Use whatever data you need from the ALEKS Periodic Table to determine the identity, mass and natural abundance of the other isotope, and complete the table. Be sure your answers have the correct number of significant digits. isotope 35 Cl Da mass (amu) 34.969 0 natural abundance 75.78% % 0 X 000 Ar

A new element has been discovered. This element has an atomic mass of 120.946 amu and only two naturally occurring isotopes. The first isotope has a natural abundance of 47.12% and an isotopic mass of 119.345 amu. What is the mass of the other isotope in amu?

An unknown element is determined to have two naturally occurring isotopes. Isotope 1 is 68.11% abundant and has a mass of 68.925580 amu, and isotope 2 has a mass of 70.9247005 amu. Determine the atomic mass of the unknown element. Express your answer to four significant figures.

There are only two naturally-occuring stable isotopes of chlorine, the masses of which are listed in the table below. Use whatever data you need from the ALEKS Periodic Table to calculate the natural abundance of each isotope and complete the table. 35 Round your entry for C1 to 4 significant digits and your entry for isotope 35 Cl 37 Cl mass (amu) 34.969 36.966 natural abundance 1% % ☐x10 X 37 C1 to 4 significant digits. Ś

Which of the following were included in Dalton's Atomic Theory but were later shown to be incorrect?   Atoms of a given element are identical in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed in chemical reactions. Atoms of different elements can combine in simple, whole-number ratios.    a I only  b I and II only  c II and III only  d I, II, and III

Part A 20 In→? +₁e 49 Express your answer as an isotope. Submit ΑΣΦ Part B A chemical reaction does not occur for this question. Request Answer 248 Cm ? +He 96 Express your answer as an isotope. B ΑΣΦ ?