Measurements, Atoms, Bonding, and Naming – Flashcards
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| What are three things that all measurements have? |
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| Magnitude, Uncertainty, Units |
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| Math is based on... |
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| Numbers |
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| Exact numbers in measurements are obtained by: |
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| Counting, Definition |
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| What does "SI" stand for? |
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| Le Sesteme Internationl d'Unites |
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| What is the base unit based on? |
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| The number 10 |
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| Name three units. |
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| Any of the following : meter, gram, liter, second, kelvin, mole, Celsius, mole. |
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| What is the "SI" system? |
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| The international system of units that the world uses to share information. |
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| What are dervied units ? |
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| Units built from base SI units |
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| Name the seven prefixes. |
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| Kilo, hecto, deka, base, deci, centi, milli |
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| What is the FLM? |
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| A quantity described by a number and a unit |
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| What is quantitive data? |
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| The amount of something |
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| What is qualitative data? |
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| Descriptive data that explains how something is |
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| When converting a unit to a greater unit, which way does the decimal point move? |
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| Ex: deci --> Kilo ; to the left. |
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| Convert 56mm to cm. |
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| 5.6cm |
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| Which measurement has the greatest quantity ? a)o.o49L b)49mL c)49000mL d)all are equal |
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| D |
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| Isotopes are atoms of the same element that have different : a)principal chemical properies b)masses c)# of protons d)# of electons |
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| B |
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| Chlorine has atomic number 17 and mass number 35. It has : a)17P, 17E, 18N b)35P, 35E, 17N c)18P, 18E, 17N |
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| A |
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| Carbon 14 (atomic number 6) has a) 6 neutrons, b)8 neutrons, c)10 neutrons, d)14 neutrons |
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| B |
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| What is the region outside the nucleus where an electron can be found ? |
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| electron cloud |
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| All atoms of the same element have the same : a)atomic mass b)number of neutrons c)mass number d)atomic number |
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| D |
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| How many orbitals are in the f sublevel ? a)5 b)7 c)9 d)18 |
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| B |
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| Rutherford concluded that a)atoms are mostly empty space b)atoms contain no charged particles c)electrons formed the nucleus d)atoms were indivisible. |
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| A |
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| What is the mass number? |
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| The number of protons minus the number of neutrons |
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| What are the three parts of an atom? |
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| Neutrons, electrons and protons. |
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| What is the charge of an electron? |
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| negative |
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| What is radioactivity? |
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| Breakdown of elements |
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| What is half-life ? |
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| Time it takes for 1/2 of an element to decompose |
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| Write the electron configuration for silver |
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| 1s^2 2s^2 2p^6 3s^2 or [Kr]5s^2 4d^9 |
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| What is an atom ? |
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| The smallest part of something |
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| What is the nucleus made of? |
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| Protons and Neutrons. |
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| Multiple covalent bonds may occur in atoms that contain carbon, nitrogen or... a)chlorine b)hydrogen c)oxygen d) helium |
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| C |
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| To draw a Lewis Structure, one must know the... |
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| Number of valence electrons |
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| In a covalent bond, _____ are shared. |
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| Electrons |
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| If two covalently bonded atoms are identical, the bond is: a) nonpolar covalent b)polar covalent |
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| A |
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| The electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does nitrogen need to satisfy the octet rule? |
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| 5 |
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| Atoms are ____ when they are combined. a)more stable b)less stable |
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| A |
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| What element has the highest electronegativity? |
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| Fluoride |
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| Where can you find the number of valence electrons on a periodic table? a)period b)group c)family |
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| B |
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| How many bonds can nitrogen form? |
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| 5 |
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| How many bonds can carbon form |
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| 4 |
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| How many bonds can sulfur form? |
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| 6 |
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| How many bonds can hydrogen form? |
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| 1 |
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| How many valence electrons are in alkaline-earth metals ? |
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| 2 |
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| Bonds that are more than 50% ionic are considered a)polar covalent b)nonpolar covalent c)ionic |
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| C |
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| In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by a)2 electrons b)8 electrons c)4 electrons |
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| B |
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| How many elements do Ternary Ionic Compounds contain? |
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| At least three elements |
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| When are Roman numerals used? |
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| When transitional metals are involved |
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| Whare are three exceptions for using Roman Numerals? |
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| Ag (silver), Zn (zinc) , Al (auminum) |
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| How do you know when a formula is an acid? |
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| Hydrogen is the first element listed |
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| When naming elements, when do you use prefixes? |
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| In covalent (nonmetal+nonmetal) bonds |
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| What is the prefix for 7 ? |
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| hepta |
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| What does (ag) stand for? |
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| aqueous |
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| Which contains oxygen? a)hydrochloric acid b)carbonic acid |
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| B |
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| Is K2O ionic or covalent? |
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| Ionic |
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| Name SF4 |
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| Sulfur Tetrafluoride |
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| What is the formula for ammonium carbonate? |
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| NH4CO3 |
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| Name the Ionic compound CO3N2 |
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| nitrogen carbonate |
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| What is the formula for nitric acid? |
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| HNO3 |
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| Name K2S |
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| potassium sulfide |
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| What is Fe+2 + CO3-2 ? |
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| FeCO3 |
