a. Is Potassium a metal, non-metal, or metalloid? b. Based on your answer to part (a) above, would potassium be considered a good conductor of electricity? c. The boiling point of potassium is 759 °C. How many significant figures are in the boiling point of potassium in °C? d. What is the boiling point of potassium in °F? e. What is the boiling point of potassium in Kelvin? f. What is the atomic symbol for potassium? g. What is the atomic number for potassium? h. What is the atomic mass for potassium? i. How is the atomic number related to the number of protons, neutrons, and/or electrons? j. How is the mass number related to the number of protons, neutrons, and/or electrons? k. Potassium has three naturally occurring isotopes: "K, "K, and "K. Complete the following table: Isotope of Platinum Atomic Number of Number of Number of Mass Number Protons Neutrons Electrons Number 3°K 4°K 4K

a. Is Potassium a metal, non-metal, or metalloid? b. Based on your answer to part (a) above, would potassium be considered a good conductor of electricity? c. The boiling point of potassium is 759 °C. How many significant figures are in the boiling point of potassium in °C? d. What is the boiling point of potassium in °F? e. What is the boiling point of potassium in Kelvin? f. What is the atomic symbol for potassium? g. What is the atomic number for potassium? h. What is the atomic mass for potassium? i. How is the atomic number related to the number of protons, neutrons, and/or electrons? j. How is the mass number related to the number of protons, neutrons, and/or electrons? k. Potassium has three naturally occurring isotopes: "K, "K, and "K. Complete the following table: Isotope of Platinum Atomic Number of Number of Number of Mass Number Protons Neutrons Electrons Number 3°K 4°K 4K

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter2: Atoms, Molecules, And Ions

Section: Chapter Questions

Problem 90QAP: Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius...

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Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?
5.) Correctly match the terms listed on the left with the substances listed on the right. More than one term may be used for each substance. A. element B. compound C. heterogeneous Mg Fe mixed with sand saltwater D. mixture water E. homogeneous F. pure substance G. Solution M9SO. 41 8 3. 5 CO
22. is a statement about a regularity in nature law a. b. theory C. d. 23. The temperature in Boston is 23F. What is its absolute temperature in K? a. 268 b. 273 a. b. hypothesis Both a and c 11 11.0 C. 296 d. 24. What is referred to as a compound with water molecules weakly bound in its crystals a. polyatomic ion b. polymer Answer is not among the choices 25. The dimension of a box is specified as 2.0 cm x 2.15 cm by 2.561 cm. If you compute for the volume, what should be your final answer? c. hydrate d. aqueous substance C. d. 11.01 11.012 26. In the scientific method, which should be the first step among the choices? a. hypothesis observation b. experimentation C. d. development of theory
7. What is a pure substance that is only made of type of atom? A. Element C. Compound D. Elixir B. Suspension What is a molecule that is made of atoms of two or more elements chemically 8. bonded together? A. Heterogeneous B. Heteronuclear C. Homogeneous D. Homonuclear 9. Which best describes heterogeneous mixtures? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 10 Which best describes a homogenous mixture? A. They must always be made of liquid components. No gas or solid components. B. The components must always be mixed or dispersed uniformly within the same physical state. C. The components are always visible and distinguishable from the other components. D. All of the options are correct. 11 Which method would be the most effect to separate…
6. Which is related to a chemical property? a. water turns into steam b. copper surfaces tarnish 7. When salt is mixed in water, what is produced? a. a substance b. a compound 8. Water is an example of a/an Monoatomic ion Polyatomic ion a. b. 9. What is common to both nickel and copper? They are both in the same period. b. They are both in the same group. 10. Which statement is true? a. HNO₂ is called nitric acid. b. C. d. C. a mixture d. Both a and c C. d. butter melts in hot pandesal Both a and b c. d. Oxygen hydride Both b and c They are both metalloids Both a and b Iodide is a mono atomic cation. C. Sodium hydroxide contains a polyatomic d. Both b and c anion.
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