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DD Chem Ch 4

Here are some of the review questions from Chapter 4.

QuestionAnswer
2. What do we call the current model of the atom? The Quantum Mechanical Model (or the Electron Cloud Model).
3. When waves overlap so that their crests get higher and troughs get deeper, what is that called? Constructive interference.
4. When wave crests and troughs overlap to cancel each other out. Destructive interference
5. Fill in the blank: In order to come up with his model of the atom, Erwin Schrödinger analyzed the electrons as if they were _______. waves.
7. How many electrons can a single orbital hold? A single orbital can hold a maximum of $2$ electrons (with opposite spins, according to the Pauli Exclusion Principle).
15. What do we call the elements in Group 8A on the Periodic Table of Elements? Noble gases
20. Name three properties of metals, and compare them to the relevant properties of nonmetals. "1. Electrical/Thermal Conductivity: Metals are good conductors of heat and electricity; nonmetals are poor conductors (insulators). 2. Malleability/Ductility: Metals are malleable (can be hammered into sheets) and ductile (drawn into wires); nonmetals are brittle when solid. 3. Luster: Metals have a shiny metallic luster; nonmetals are dull in appearance."
23. Nitrogen and hydrogen react to form a compound. Is it an ionic compound? No, it is NOT an ionic compound. (It forms a covalent compound, such as ammonia, because both nitrogen and hydrogen are nonmetals).
21. What are the names of the compounds formed between the following elements? Rb and oxygen a. Rubidium oxide
16. Which of the following elements should have very similar chemical behaviors? Ca, Se, Al, Pb, In Al (Aluminum) and In (Indium), because they are both in Group 3A (Group 13) and have the same number of valence electrons.
What are the names of the compounds formed between the following elements? Sr and sulfur Strontium sulfide
What are the names of the compounds formed between the following elements? calcium and nitrogen Calcium nitride
What are the names of the compounds formed between the following elements? magnesium and I Magnesium iodide
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