Name ______________________________________ Date __________________ Class Period _________
Atoms, Elements, and Compound Test Study Guide
I.
Fill in the blank with the correct word. ( molecule, equation, compound, element, subscript,
coefficient, formula)
1. A pure substance made of only 1 type of atom is called element.
2. When 2 or more elements are combine to form a new substance is a compound .
3. A formula is used to represent a compound.
4. Equations are used to show a chemical change or reaction needed to make a compound.
5. The small number to the right of an element symbol that tells the number of atoms is called a
subscript.
6. The large number to the left of the element symbol that tells the number of molecules is called a
coefficient.
7. A molecule is the smallest piece of a compound.
II. Short Answer.
8. In an equation/formula what does a subscript tell you?
A subscript tells you the number of atoms.
9. In an equation what does a coefficient tell you?
A coefficient tells you the number of molecules.
10. Draw a molecule of water below.
11. Label each example below as compound (C) or element (E). Then write the name of each element and how
many atoms of each
a. C_CO2 carbon 1, oxygen 2
e. C CaCo2 calcium 1, cobalt 2
b.
f. E Al aluminum__________
E Fe
c.
iron
C H20 hydrogen 2, oxygen 1
d.
C HCl
hydrogen 1, chlorine 1
g. E O2 ___oxygen 2_________________
h. C AlCl3 alumininum 1, chlorine 3____
12. Label the atom model below. Use the following: proton, electron, neutron, nucleus, k
shell, L shell, M shell, 2, 8, 18.
M shell 18
L shell 8
K shell 2
Proton
+
0
Neutron
Nucleus
Electron
13. Label
the periodic table box below. Use the following: atomic number, element
symbol, element name, atomic mass, protons and electrons, protons PLUS neutron.
5
Atomic number protons and electrons
B
Element symbol
Boron
Element name
10.811
Atomic mass protons PLUS neutrons
Subatomic
Particle
14. Proton
15.Neutron
16. Electron
Location
Nucleus
Nucleus
Outside nucleus
Charge
Positive +
Neutral 0
Negative -
Matching: Using the word box below, write the letter of the correct
vocabulary word for each definition.
17)
M The 3 smaller pieces found inside an atom.
18)
19)
20)
K The building block of matter/smallest part of matter.
L Pure substances made of only one type of atom.
I The heavy center of the atom.
21)
J Energy levels around the nucleus where electrons are moving.
22)
D holds 2 electrons
23)
FThe positive subatomic particle found in the nucleus.
24)
N holds 8 electrons.
25)
H The negative subatomic particle found outside the nucleus.
26)
_G holds 18 electrons.
27)
B Number that tells the number of protons PLUS neutrons.
28)
C Letter(s) that chemically represent each element
29)
A Number that tells the number of protons and electrons.
A. Atomic number
B. Atomic mass
C. Element symbol
D. K shell
E. Neutron
F. Proton
G. M shell
H. Electron
I. Nucleus
J. Shells
K. Atom
L. Element
M. Subatomic particles
N. L shell
Use the chart above to answer the following questions.
30. Which element has more protons – Al or Li?
Al – number 13
31. What would be the correct way to write the element symbol for aluminum # 13-AL or Al?
Why? Al because the 2nd letter should be lower case to show it is all the same element.
32. What subatomic particle determines the type of element?
Protons
32. How many neutrons does Sodium (Na) have? Show your math.
23 – 11 = 12 neutrons.
33. If an element loses an electron does it become a new element? No it stays the same
element.