What are the two transition metals that areused in making jewelry and are the group 11 elementswith the lowest atomic masses?

A 67.2 g sample of gold and palladium allo contains 3.40x10^23 atoms. What is the mass percentage of the gold in the alloy. And what is the mass percentage of the palladium in the alloy? Do not give handwriting solution.

1. Using the various group classifications from the periodic table, assign all appropriate labels to each of the following elements. Each element will have multiple (2 or more) answers. (a) Silver (b) Tennessine (c) Samarium (d) Antimony 2. Calculate the numbers of each type of nucleon and the number of electrons in each of the following species. (a) neodymium-149 (b) tantalum-179 (c) sellenium-79 dianion (d) krypton-85 trication 3. Write the ground-state electron configuration for the following atoms or ions. Use core notation in your electron configurations at your own discretion. (a) As (b) Au (c) Ce (d) Zn2− (e) Po4+ 4. Write an appropriate set of four quantum numbers (n, l, ms & ms) that could be representative of a valence electron in each of the following atoms or ions. (a) Bi (b) Sr (c) Mo (d) Ru2+ (e) Eu 5. In theory, there are an infinite number of energy levels and atomic orbital types that we can define using the solutions to the Schrödinger…

Shown in the accompanying image is a general Lewis dot formula for a family of representative elements wher X: The number of paired electrons present in the valence shell of a member of this family of elements is [A]

Indicate the physical state for each of the following elements at 25 °C and normal pressure. Classify each element as a metal,nonmetal, or semimetal: (a) aluminum (b) hydrogen (c) helium (d) radium

Atoms of each of the following elements are essential for life. Give the group name for the following elements:(a) chlorine(b) calcium(c) sodium(d) sulfur

21. Based on your understanding of the relationships between the structures and physical properties of elements and compounds, which of the substances (Table 1) is most likely a metallic element? Why? Explain your reasoning in at least two (2) sentences.

5. Why are almost all metals in nature found as ionic compounds in ores instead of being in the pure state? What must be done to a sample of ore to obtain a metal substance that has desirable properties?

Consider the following elements: chromium, tungsten, yttrium, vanadium, indium Which one does not belong to the group? and, What is common to the rest of the elements in the list above?

What ions are part of the silver group?