## Measurements, Atoms, Bonding, and Naming

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