Week 6 Quiz

5. A lithium atom contains 3 protons, 4 neutrons and 3 electrons. What would be formed if one proton is added to this atom? O A. a lithium ion O B. a different isotope of lithium O C. a beryllium ion O D. a neutral atom of beryllium

just need to know how to do part A so i can do the rest!

Based on the information gathered from the periodic table seen in Figure 2-H, Magnesium will most likely _____ to form an ion.     A.lose electrons B.lose neutrons C.gain electrons D.gain protons     Based on the information gathered from the periodic table seen in Figure 2-H, Magnesium (its most common isotope) has ____ neutrons.   A.10 B.12 C.36 D.24

Use a model to explain how subatomic particles interact to cause ONE of the following periodic patterns. Use evidence and scientific reasoning to justify the validity of your model.

Which of the following statements are true of chemical reactions? a. The number and types of atoms are the same in the products and the reactants.  b. Different isotopes of the same element behave similarly. c. New elements are often formed. d. Only the valence electrons are involved.

11. State whether the following elements are metals, nonmetals, or metalloids. a. Potassium b. Phosphorus C. Silicon d. lodine 12. Identify the principal type of energy (kinetic or potential) that is exhibited by each of the following. a. A piece of coal b. A falling rock ||| c. A compressed metal spring d. A rolling soccer ball on a level field

4. The following data were collected for several compounds of nitrogen and oxygen: Compound Mass of Oxygen that Reacts with 1.000 g of Nitrogen W 0.5711 g 1.142 g Y 2.284 g 2.855 g These data support which of the following? a. Hess's Law b. Law of Definite Proportions c. Law of Multiple Proportions d. Law of Conservation of Mass

Part ARecall all the models you described in task 1. Think about the results each model would predict for the experiment with hydrogen gas. Which models of the atom does the experimental evidence support? Explain why these models are compatible with the experimental results. Part BWhich models of the atom in task 1 are not supported by the results of the hydrogen gas experiment? For each of these models, explain the experimental results that the model would predict. Models in task 1: - Dalton’s Atomic Model- Thomson’s Atomic Model- Rutherford’s Atomic Model- Bohr’s Atomic Model

1. Based on the nuclear model, and assuming that the atom is spherical in shape, draw the hydrogen, helium, and lithium atoms showing the locations of their protons, neutrons, and electrons. Hydrogen - 1 proton, 1 neutron, 1 electron Helium - 2 protons, 2 neutrons, 2 electrons Lithium - 3 protons, 4 neutrons, 3 electrons a. In what ways are the drawn atomic models similar? In what ways are they different? b. Did you find it easy to make the drawings? Why or why not?

How many protons (p), neutrons (n), and electrons (e) are in one atom of  23  12   Mg  ? (*23 is the first number on top and 12 is the second number on the bottom).   a. 12 p, 12 n, 12 e   b. 12 p, 11 n, 12 e   c. 12 p, 11 n, 10 e   d. 12 p, 11 n, 14 e

Which best describes isotopes? A. Same number of neutrons, different number of electrons B. Same number of protons, different number of neutrons C. Same number of protons, different number of electrons D. Same number of neutrons, different number of protons   Which pair of elements can form an ionic compound? A.carbon and oxygen             b. lithium and sodium c. magnesium and chloride                         d. sulfur and bromine   Which of the following statements describe chemical property? A. Aniron bar rusts. B.Ice melts when heated. C. The density of iron is 7.87 g/cm3 D. Aluminum is a silver-colored metal.   Which of the following is an extensive property? A.Boiling Point C. Mass B.Density D. Color

How many protons, neutrons, and electrons are in one atom of Zn ? O A. 30 protons, 40 neutrons and 30 electrons O B. 30 protons, 70 neutrons and 40 electrons O C. 40 protons, 30 neutrons and 40 electrons O D. 70 protons, 30 neutrons and 30 electrons

For each atom described, list the number of electrons, protons and neutrons.a. Neutral Ne 1910 b. Ca2+ with a mass number of 41

1. Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to understand how X-rays worked and noticed in her studies that the element, Uranium, gave off rays that could be measured but did not know what the rays were. She assumed that the rays came from the uranium itself instead of through different molecules interacting with each other. To study the rays, she used an instrument, called an electrometer, that studied the electricity that the rays passed through the air. Through this she was able to discover that the more uranium atoms there were in a compound, the stronger the rays that came off of it. She used this discovery to test other minerals that emitted more rays than Uranium, and discovered the elements Thorium, Polonium and Radium. Through her discoveries of these elements, scientists were able to find the structure of the atom and even how the rays can be used to fight cancer. What was Marie Curie’s observation? 2. What was Marie Curie's…

Neon-22 contains 12 neutrons. It also contains a. 12 protons. b. 10 protons. c. 22 protons. d. 22 electrons.