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Chapter 2 questions
Question | Answer |
---|---|
What determines the physical and chemical properties of matter? | The structure of atoms |
What are atoms composed of? | They are composed of subatomic particles called protons, neutrons, and electrons. |
What do the particles with the same charges do when close to each other? | They repeal each other. |
What do particles with different charges do when close to each other? | They attract each other. |
What are the charges of protons, neutrons, and electrons? | Electron is -1 Proton is +1 Neutron has no charge |
What is the heaviest subatomic particle? | Neutron |
What is the lightest subatomic particle? | Electron |
What does the structure of an atom look like? | Has a nucleus with the neutrons and protons inside and the electrons of the outer rings. |
What subatomic particles are the same amount in an atom? | protons and electrons |
What determines the atomic number of an element? | Protons |
What does the mass number tell you? | The number of neutrons plus protons |
What does the atomic number tell you? | The number of protons or electrons |
How do you state an isotope of carbon with 14 electrons? | Carbon-14 |
What are the seven diatomic particles? | Hydrogen, nitrogen, oxygen, Florine, Chlorine, Bromine, and Iodine. |
What are metalloids? | Metalloids have some properties of both metals and nonmetals |
What is the atomic weight formula? | 1st isotope-(isotope percent in decimal)(isotope weight) + 2nd isotope- (isotope percent in decimal)( isotope weight) |
When atoms go through chemical reactions they don't change but what is lost or gained? | Electrons |
What do metals tend to become and how? | They tend to become cations by losing their electrons. |
What do nonmetals tend to become and how? | They tend to become anions by gaining electrons. |
Is their any molecules in ionic compounds? | No |
When writing chemical formulas for ions what do the charges help determine? | The subscript for the other atom. |
What are the six essential elements? | Carbon, nitrogen, oxygen, Phosphorus, and Sulfur |
What do cations formed from nonmetals have at the end of its name? | -ium |
What do cations formed from metals have as a name? | The name of the metal followed by the word ion. |
What is used to name a metal that can form cations with different charges? | The elements name with the charge of it in roman numeral form in parentheses. Example- iron(III) |
How are the names of monatomic anions formed? | The ending of the element name is replaced -ide. Example- oxide ion is O^-2 |
What are oxyanions? | Polyatomic anions that have oxygen |
When are the endings -ate and -ite used for oxyanions? | -ate is used for the oxyanions that have the most oxygen atoms of the other while -ite is used for the oxyanions with the fewest oxygen atoms |
What do acid formulas always start with? | H molecule |
What is an acid composed of? | A hydrogen + ion that neutralizes an anion. |
What happens to an anions name that has -ide ending when becoming an acid? | Ending is changed to -ic and name begins with hydro- |
What happens to an anions name with endings -ate or -ite when it changes into a acid? | Prefixes are the same -ite becomes -ous -ate becomes -ic |
What rules are used for naming binary molecular compounds? | look at notes |
What are the greek prefixes for number 1-10? | Mono-1 Di-2 Tri-3 Tetra-4 Penta-5 Hexa-6 Hepta-7 Octa-8 Nona-9 Deca-10 |
What are the naming rules for alkanes? | All alkanes end with -ane and begin with the greek prefix that show the amount of carbons |
Which groups on the periodic table form only one ion and what is the charge? | 1A are alkali metals; form 1+ions 2A are alkaline earths; form 2+ ions 3A form 3+ ions 7A are halogens; form 1- ions 6A form 2- ions 5A form 3- ions 8A are noble gases |
How do you predict the chemical formulas of two elements? | 1. Get the possible charges of each element 2. Balance the two elements Ex. Ga and F Ga has a potential ion of 3+ and F has 1- Ga^3+ F^1- GaF_3 Number of superscripts becomes the bottom script of the other element and done |