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Intro Chemistry 1
| Question | Answer |
|---|---|
| What digits are always significant? | All nonzero digits. |
| How many significant figures are in 0.0025? | 2 |
| How many significant figures are in 0.2050? | 4 |
| How many significant figures are in 2500.? | 4 |
| What is scientific notation? | A number written as a coefficient between 1 and 10 multiplied by a power of 10. |
| Convert 0.00045 to scientific notation. | 4.5 × 10⁻⁴ |
| What is the base metric unit for mass? | Gram (g) |
| What is the base metric unit for length? | Meter (m) |
| What is the base metric unit for volume? | Liter (L) |
| What prefix means 10³? | kilo (k) |
| What prefix means 10⁻³? | milli (m) |
| What prefix means 10⁻⁶? | micro (μ) |
| What prefix means 10⁻⁹? | nano (n) |
| What is density? | Mass divided by volume. |
| What is the formula for density? | D = m/V |
| How do you convert Celsius to Kelvin? | K = °C + 273.15 |
| How do you convert Celsius to Fahrenheit? | °F = (9/5 × °C) + 32 |
| How do you convert Fahrenheit to Celsius? | °C = (°F − 32) × 5/9 |
| What are the four states of matter? | Solid, liquid, gas, plasma. |
| What is an element? | A substance made of only one type of atom. |
| What is a compound? | Two or more elements chemically combined. |
| What is a homogeneous mixture? | A mixture with uniform composition throughout. |
| What is a heterogeneous mixture? | A mixture with nonuniform composition. |
| What is a physical change? | A change that does not alter chemical identity. |
| What is a chemical change? | A change that forms new substances. |
| What is the Law of Conservation of Mass? | Matter cannot be created or destroyed. |
| What is the Law of Conservation of Energy? | Energy cannot be created or destroyed. |
| What is kinetic energy? | Energy of motion. |
| What is potential energy? | Stored energy. |
| What is the charge of a proton? | +1 |
| What is the charge of a neutron? | 0 |
| What is the charge of an electron? | −1 |
| What is the atomic number? | Number of protons. |
| What is the mass number? | Number of protons plus neutrons. |
| What are isotopes? | Atoms of the same element with different numbers of neutrons. |
| How do you find the number of neutrons? | Mass number − atomic number. |
| What is the speed of light? | 3.00 × 10⁸ m/s |
| What is the relationship between frequency and wavelength? | They are inversely proportional. |
| What equation relates wavelength and frequency? | c = λν |
| What is the electron configuration of Hydrogen? | 1s¹ |
| What is the electron configuration of Helium? | 1s² |
| What is the electron configuration of Carbon? | 1s² 2s² 2p² |
| What is the electron configuration of Oxygen? | 1s² 2s² 2p⁴ |
| In which direction does atomic radius increase? | Down a group and to the left. |
| In which direction does metallic character increase? | Down a group and to the left. |
| Where are metals located on the periodic table? | Left side. |
| Where are nonmetals located on the periodic table? | Right side. |
| Where are metalloids located on the periodic table? | Along the staircase line. |
| What is an ionic compound? | A compound formed between a metal and a nonmetal. |
| What is a molecular compound? | A compound formed between nonmetals. |
| What is NH₄⁺? | Ammonium. |
| What is NO₃⁻? | Nitrate. |
| What is SO₄²⁻? | Sulfate. |
| What is the name of NaCl? | Sodium chloride. |
| What is the formula for calcium chloride? | CaCl₂ |
| What is the formula for aluminum oxide? | Al₂O₃ |
| What is the name of HCl(aq)? | Hydrochloric acid. |
| What is the name of H₂SO₄(aq)? | Sulfuric acid. |
Created by:
Erista