The smallest amount of an element

I am composed of two or more atoms.
I am a combination of two or more pure substances.
I am NOT a pure substance.

The element found in both the ocean and the atmosphere.

When Michael blows bubbles of gas in his milk with a straw he is showing an example of a ______ change.

Keith and Jaylee see a bottle with Na on it. They will most likely find what element inside?

The number of elements in the compound

FeC2OH3Au

The MOST abundant element in the atmosphere.

When Summer and Jennifer blow threw a straw into a clear liquid, they notice bubbles of gas forming, a cloudy substance in the liquid, and small white particles form. This is an example of a ______ change.

The best example of an element

A B C
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True of both compounds and elements:

A. Made from more than one element
B. A pure substance
C. Found on the periodic table
D.Formed through a chemical reaction
E.Found on Earth
F. Essential for Life

The following letters are signs of chemical change:

A. Loud sounds are produced
B. Heat is released
C. Smoke is produced
D. Bright light is given off
E. Many colors are produced

One of the following is not an element:

A. water
B. gold
C.neon

True only of compounds:

A. Made from more than one element
B. A pure substance
C. Found on the periodic table
D.Formed through a chemical reaction
E.Found on Earth
F. Essential for Life

The most obvious sign that a chemical change occurs when vinegar is added to milk.

The incorrect symbol for the element is

He - helium
Fe - iron
Cl - chlorine
S - Sodium

Is a compound

A. Na3
B. Co2
C. CO2
D. Au