Matter-Counting Atoms And Most Common Elements Question Preview (ID: 45523)


Counting Atoms And Most Common Elements. TEACHERS: click here for quick copy question ID numbers.

What are the most common elements in the Ocean? (from most abundant to least)
a) Hydrogen, Oxygen, Sodium and Chlorine
b) Hydrogen, Sodium, Aluminum, Carbon
c) Hydrogen, Helium, Litium and Beryllium
d)

Identify which one is a molecule
a) O3
b) H2O
c) NaCl
d) H2O2

What are the most common elements in Living Things? (from most abundant to least)
a) Carbon, Hydrogen, Oxygen, and Nitrogen
b) Nitrogen, Carbon, Oxygen and Hydrogen
c)
d)

An expression of symbols and numbers that represent that a chemical change has taken place is known as a chemical ___
a) equation
b) formula
c) mixture
d) molecule

A diagram of a Water Molecule (H2O) shows two hydrogen atoms and one oxygen atom have formed a chemical ___
a) bond
b) solution
c) mixture
d) atom

Compounds are expressed by symbols and numbers and written as a chemical ___
a) formula
b) equation
c) symbols
d)

When reading a chemical equation the arrow is read as___
a) yields
b) equals
c) is
d) makes

When reading a chemical equation the right side of the equation is known as the___
a) product
b) reactants
c) yield
d) stuff we end up with

When reading a chemical equation the left side of the equation is known as the___
a) reactants
b) product
c) yield
d) stuff we're putting together

C2H5NO How many atoms of Carbon (C) are in this compound?
a) 2
b) 5
c) 10
d) 0

C2H5NO How many different ELEMENTS are in this compound?
a) 4
b) 9
c) 10
d) 5

C2H5NO How many TOTAL ATOMS are in this compound?
a) 9
b) 10
c) 2
d) 5

A compound is always a molecule but a molecule isn't always a compound.
a) True
b) False
c)
d)

Which of the following represents a COMPOUND?
a) CO
b) Co
c) Fe
d) Fe2

Two or more elements bonded together is always a
a) molecule
b) compound
c) mixture
d) atom

Two or more different elements bonded together is a ____
a) compound
b) element
c) mixture
d) atom

4Al + 3O2 -- 2Al2O3 How many oxygen atoms?
a) 6
b) 12
c) 2
d) 1

4Al + 3O2 -- 2Al2O3 How many aluminum atoms?
a) 4
b) 8
c) 2
d) 1

The number of atoms on the LEFT side (Reactants) _______ equals the number of atoms on the RIGHT side (Product) of a chemical equation.
a) always
b) never
c) usually
d) often

What are the most common elements in the Earth's Crust? (from most abundant to least)
a) Oxygen, Silicon, Aluminum, Iron, and Calcium
b) Gold, Aluminum, Silver, and Iron
c) Silicon, Oxygen, Iron, Aluminum, and Calcium
d)

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