South Pasadena • Chemistry
Name
Period
Date
2 · Elements and Compounds
STATION 1
•
THE ATOM
For each of the following, indicate whether it describes the proton (P), neutron (N), or electron (E). Each
description may refer to one or more subatomic particle.
Determines the mass of the atom
Carries a +1 charge
Has a mass of 1/1800th amu
Has a mass of 1 amu
Makes up the nucleus
Determines the identity of the atom
Is changed to form different ions
Determines the size of the atom
Has no charge
Is changed to form different isotopes.
2 · Elements and Compounds
STATION 2
Complete the following table:
Atomic
Isotope
Number
Mass
Number
Number of
Protons
20
Number of
neutrons
Number of
electrons
24
27
26
• ISOTOPIC NOTATION
13
0
13
57
131
Net Charge
24
78
–1
2 · Elements and Compounds
STATION 3
•
MORE ISOTOPIC NOTATION
Write the isotopic notation the following atoms:
 50 protons, 68 neutrons, 46 electrons

80 protons, 118 neutrons, 79 electrons

15 protons, 16 neutrons, 18 electrons

28 protons, 34 neutrons, 28 electrons
Find the number of protons, neutrons, and electrons for the following atoms:
 27Al3+
 129Xe


18
O2–
53
Cr3+
2 · Elements and Compounds
STATION 4
• CLASSIFYING MATTER
For each of the following, indicate whether it describes a metal (M), semi-metal (SM), or non-metal (NM).
1. Shiny and ductile
6. Argon, Ar, is an example
2. Poor conductors
7. Also called semiconductors
3. Magnesium, Mg, is an example
8. Silicon, Si, is an example
4. Brittle
9. Good conductors
5. Arsenic, As, is an example
10. Hydrogen, H, is an example
2 · Elements and Compounds
STATION 5
What does each of these parts represent?
•
PERIODIC TABLE
6
C
Identify each part of the periodic table:
12.011
List the seven diatomic elements:
List the two liquids at room temperature:
2 · Elements and Compounds
STATION 6
Classify each sample:
 Bromine liquid, Br2
 Ozone, O3
 Salt, NaCl
 Solid gold, Au
 Sugar, C6H12O6
•
Atom | Molecule
Atom | Molecule
Atom | Molecule
Atom | Molecule
Atom | Molecule
TYPES
OF
COMPOUNDS
Element | Compound
Element | Compound
Element | Compound
Element | Compound
Element | Compound
Identify each of the following with A = acid, C = covalent, I = ionic, or O = organic.
Na2S
C2H4
H2CO3
C4H9OH
Ca(NO2)2
P4O10
NO2
Al2(SO4)3
HClO4
2 · Elements and Compounds
STATION 7
•
MOLECULAR MASS/%COMPOSITION
Calculate the molecular masses of Na2SO3 and Ca(NO3)2.
Calculate the percent composition of each element in the following compounds.
Na2SO3
%Na =
%S =
%O =
Ca(NO3)2
%Ca =
%N =
%O =
2 · Elements and Compounds
STATION 8
Show your work for each question.
What is the molar mass of propane, C3H8?
How many moles are in a sample of 4.55 × 1024 molecules of C3H8?
What is the mass of a 15.2-L sample of C3H8 at STP?
•
MOLES
2 · Elements and Compounds
STATION 9
•
MORE MOLES
Show your work for each question.
What is the molar mass of ozone, O3?
How many moles O3 occupy 15.6 L at STP?
How many molecules of O3 are in a 61.9 g sample?
2 · Elements and Compounds
STATION 9
Show your work for each question.
What is the molar mass of ozone, O3?
How many moles O3 occupy 15.6 L at STP?
How many molecules of O3 are in a 61.9 g sample?
• MORE MOLES