5. Predict the missing value (?) for radioactive radium (Ra). The atomic radius, density, and melting point are given for elements in Group IIA/2. Element Atomic Radius Density at 20 °C Melting Point 215 pm 217 pm 2.63 g/mL 3.65 g/mL (?) g/mL Sr 769 °C Ва 725 °C Ra (?) pm (?) °C

Pick any four non metallic elements from Group 3A - 8A. Group_A Element: a) Discuss one benefit or hazard of the element. b) Discuss one commercial application of element A Element: Group a) Discuss one benefit or hazard of the element. b) Discuss one commercial application of element Group_A Element: a) Discuss one benefit or hazard of the element. b) Discuss one commercial application of element Group_A Element: a) Discuss one benefit or hazard of the element. b) Discuss one commercial application of element

Which of the following elements would you expect to have similar properties? As Te Ar Sn He

QUESTION 9 Which element in period #6 has similar chemical properties to Magnesium? Oa. Si Ob. Ra Ос. Са Od. None of These

For some questions you will need to use the special periodic table attached in the images below! Treat Je, Qu, Ap, and Bg as NONMETALS! A) Enter the balanced chemical equation for the reaction of 2-bogusopropanoic acid with KOH. B) Enter the balanced equation for the ionization of 2-bogusopropanoic acid in water.

On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance Mass (u) 46Ti 75.700% 45.95263 48Ti 12.400% 47.94795 50Ti 11.900% 49.94479 What is the average atomic mass of titanium on that planet?

What is the formula of palladium (IV) oxide? Pd40 PdO4 PdO Pd₂0 PdO2

n lo Report Form, Density of Nails, Baby Oll, ana MOPE Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7.14 Cr 7.15 Sn 7.26 niloded lo sl Fe 7.87 Ni 8.90 8.96 Pb 11.3 Au 19.3 o dee 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby…