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Periodic Table
Substances
Elements
100
Evidence that a chemical reaction has occurred is...
Bubbling, color change, temperature change, new substances formed.
100

Convert: 102856.05 cm = __________km.

1.0285605 km

100

Mendeleyev rearranged the period table so that elements with similar properties were in the same column on the periodic table. He then predicted that undiscovered elements would fill the gaps on periodic table.

How did Mendeleyev contribute to the future discovery of unknown elements?

100
What is a substance? Give a SPECIFIC example.
Everything. O, H2O, He, NaCl...
100

The names of the elements in H2O.

What are hydrogen and oxygen?

200
What is a chemical reaction?
When starting substances change into new, different substances.
200

1 cm3 = ____ ml = ____ g

1 cm3 = 1 ml = 1 g

200

The periodic table illustrates that 65 of these types of elements.

What are metals?

200
What is a particle? Give a SPECIFIC example?
Everything. O, H2O, He, NaCl...
200

The names of the elements found in sodium chloride.

What are sodium and chorine?

300
What happens to atoms when a chemical reaction occurs?
They rearrange. (are not created or destroyed)
300

How did you know that the chalk did not dissolve?

The water was cloudy and the chalk did not go through the filter paper. It was on the filter paper.

300

This table arranges elements from lightest to heaviest atomic weight.

The periodic table of elements.

300
What is a single element? Give a SPECIFIC example.
One kind of element in a particle or substance. He, O2, Na...
300

The chemical formula for the substance created from carbon and oxygen.

What is CO2?

400
True or false: A chemical reaction always occurs when substances combine?
False!
400

Find the number of neutrons in Silver.

61 neutrons

400

The lightest element, with an atomic weight of 1.

What is hydrogen?

400

What is a compound? Give a SPECIFIC example.

Two or more elements in a particle or substance. H2O, NaCl...

400

The common name for NaCl?

What is salt?

500
Write an example of a chemical reaction using chemical formulas.
H2 + O2 = H2O
500

What does the atomic mass measure?

The mass of the nucleus or the mass of protons and neutrons.

500

This noble gas is used to inflate balloons and has an atomic weight of 2.

What is helium (He)?

500
What is the difference between melting and dissolving?
Melting needs one substance while dissolving needs two.
500

The Sun's mass is about 75% of this element.

What is hydrogen?