Basic Atomic Structure
The ___ of an element is the average mass of an element's naturally occurring atom, or isotopes, taking into account the ___ of each isotope.
Atomic mass; percentage
Give the symbol of and the number of neutrons in one atom of: (Mass numbers are ALWAYS whole numbers) Barium Carbon Fluorine Europium Bismuth Hydrogen Magnesium Mercury
Barium -- Ba, 81 Carbon -- C, 6 Fluorine -- E, 10 Europium -- Eu, 90 Bismuth -- Bi, 126 Hydrogen -- H, 0 Magnesium -- Mg, 12 Mercury -- Hg, 121
The number of protons in one atom of an element determines the atom's ___, and the number of electrons determines the ___ of the element.
Identity; behavior
Give the symbol of and the number of protons in one atom of: Lithium Iron Oxygen Krypton Bromine Copper Mercury Helium
Lithium -- Li, 3 Iron -- Fe, 26 Oxygen -- O, 8 Krypton -- Kr, 36 Bromine -- Br, 35 Copper -- Cu, 29 Mercury -- Hg, 80 Helium -- He, 2
The ___ of an element is the total number of protons and neutrons in the ___ of the atom.
Mass number; nucleus
The mass number is used to calculate the number of ___ in one atom of an element. In order to calculate the number of neutrons you must subtract the ___ from the ___.
Neutrons; atomic number; mass number
Their respective charges are:
Positive, neutral, negative
The 3 particles of the atom are:
Proton, neutron, electron
The atomic number tells you the number of ___ in one atom of an element. It also tells you the number of ___ in a neutral atom of that element. The atomic number gives the "identity" of an element as well as its location on the periodic table. No two different elements will have the ___ atomic number.
Protons; electrons; same
Fill in the missing items: a) Name: Symbol: Na Z: A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: b) Name: Symbol: Z: 17 A: # Protons: # Electrons: 18 # Neutrons: Isotomic Symbol: c) Name: Potassium Symbol: Z: A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: d) Name: Symbol: P Z: A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: e) Name: Iron Symbol: Z: A: # Protons: # Electrons: 24 # Neutrons: Isotomic Symbol: f) Name: Symbol: Z: A: # Protons: 53 # Electrons: # Neutrons: Isotomic Symbol: g) Name: Silver Symbol: Z: A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: h) Name: Symbol: Z: 36 A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: i) Name: Symbol: W Z: A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: j) Name: Symbol: Z: 29 A: # Protons: # Electrons: # Neutrons: Isotomic Symbol: k) Name: Symbol: Z: A: # Protons: 49 # Electrons: # Neutrons: Isotomic Symbol: l) Name: Symbol: Z: A: # Protons: 79 # Electrons: 78 # Neutrons: Isotomic Symbol: m) Name: Symbol: Z: 16 A: # Protons: # Electrons: # Neutrons: Isotomic Symbol:
a) Name: Sodium Symbol: Na Z: 11 A: 23 # Protons: 11 # Electrons: 11 # Neutrons: 12 Isotomic Symbol: 23 over 11 Na b) Name: Chlorine Symbol: Cl Z: 17 A: 35 # Protons: 17 # Electrons: 18 # Neutrons: 19 Isotomic Symbol: 35 over 17 Cl- c) Name: Potassium Symbol: K Z: 19 A: 39 # Protons: 19 # Electrons: 19 # Neutrons: 20 Isotomic Symbol: 39 over 19 K d) Name: Phosphorus Symbol: P Z: 15 A: 31 # Protons: 15 # Electrons: 15 # Neutrons: 16 Isotomic Symbol: 31 over 15 P e) Name: Iron Symbol: Fe Z: 26 A: 56 # Protons: 26 # Electrons: 24 # Neutrons: 30 Isotomic Symbol: 56 over 26 Fe+2 f) Name: Iodine Symbol: I Z: 53 A: 127 # Protons: 53 # Electrons: 53 # Neutrons: 74 Isotomic Symbol: 127 over 53 I g) Name: Silver Symbol: Ag Z: 47 A: 108 # Protons: 47 # Electrons: 47 # Neutrons: 61 Isotomic Symbol: 108 over 47 Ag h) Name: Krypton Symbol: Kr Z: 36 A: 84 # Protons: 36 # Electrons: 36 # Neutrons: 48 Isotomic Symbol: 84 over 36 Kr i) Name: Tungsten Symbol: W Z: 74 A: 184 # Protons: 74 # Electrons: 74 # Neutrons: 110 Isotomic Symbol: 184 over 74 W j) Name: Copper Symbol: Cu Z: 29 A: 64 # Protons: 29 # Electrons: 29 # Neutrons: 35 Isotomic Symbol: 64 over 29 Cu k) Name: Indium Symbol: In Z: 49 A: 115 # Protons: 49 # Electrons: 49 # Neutrons: 66 Isotomic Symbol: 114 over 115 In l) Name: Gold Symbol: Au Z: 79 A: 197 # Protons: 79 # Electrons: 78 # Neutrons: 118 Isotomic Symbol: 197 over 79 Au m) Name: Sulfur Symbol: S Z: 32 A: 32 # Protons: 16 # Electrons: 18 # Neutrons: 16 Isotomic Symbol: 32 over 16 S2-
Name the element which has the following numbers of particles: a. 26 electrons, 29 neutrons, 26 protons b. 53 protons, 74 neutrons c. 2 electrons (neutral atoms) d. 20 protons e. 86 electrons, 125 neutrons, 82 protons f. 0 neutrons
a. Iron b. Iodine c. Helium d. Calcium e. Lead f. Hydrogen
If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No) a. Number of protons b. Number of neutrons c. Number of electrons in a neutral atom d. Number of electrons
a. Yes b. No c. Yes d. No
