Atoms
Periodic Table
More Periodic Table
Chemical Reactions
Compounds and Mixtures
100
Atoms cannot be seen with this instrument.
What is a microscope ?
100
Metal, nonmetal and metaloid.
What are the three main types of elements ?
100
These contains elements that have similar physical or chemical properties.
What is a group ?
100
A chemical reaction produces a chemical ______.
What is change ?
100
This is a substance made up of two or more elements chemically combined .
What is a compound ?
200
These circle the nucleus of the atom and have a negative charge.
What are electrons ?
200
The atomic ________ increases across periods or rows in the Periodic Table.
What is number ?
200
A row of elements in the periodic table whose properties change gradually and predictably.
What is a period ?
200
This is the end result of a chemical reaction .
What is a product ?
200
A substance that has been mixed together but not chemically combined.
What is a mixture ?
300
This part of the atom is made up of protons and neutrons.
What is the nucleus ?
300
The balloon symbolizes this state of matter in the Periodic Table in our science book .
What is a gas ?
300
This is a man made element .
What is synthetic ?
300
Cooking, burning paper and rotten food .
What are examples of chemical reactions ?
300
Two examples of a mixture.
What is answers may vary - salt water, trail mix etc. ( things that can easily or physically separated.)
400
26 protons in the nucleus of this element.
What is iron ?
400
This element is to the left of copper.
What is nickel ?
400
The eight groups which include metals, nonmetals and metalloids.
What are the representative elements ?
400
This type of chemical reaction releases heat energy .
What is an exothermic chemical reaction ?
400
Water is an example of a __________.
What is a compound.
500
This is the same as the number of protons in the nucleus of an atom .
What is atomic number ?
500
Russian chemist thought to be the first publisher of the Periodic Table of Elements.
Who is Mendeleev ?
500
The symbol DB stands for this element .
What is dubnium ?
500
This scientific law states that mass cannot be destroyed it can only change form.
What is the Law of Conservation of Mass ?
500
A __________ can be separated only by chemical means and a ____________ can be separated by physical means .
What is compound and mixture ?
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