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History of Chemistry
Parts of an Atom
Branches of Chemistry
Atomic Numbers
Chemical Reactions
200
Early people were producing these types of changes even though they didn't know what was happening. For example - extracting metals from ores and making jewelry.
chemical
200
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
200

This is the area of chemistry that studies chemicals containing carbon.

Organic

200
Atomic numbers of an atom are the same as the number of what in an atom?
protons
200

If two substances react and the temperature of the mixture increases, it is called this.

Exothermic

400
The earliest form of chemistry was called _______.
alchemy
400
These particles are located within the nucleus, and have no charge.
Neutron
400

Branch of chemistry that studies the processes that take place in living organisms.

Biochemistry

400
What element has a number of 56?
barium
400

If two substances react and the temperature of the mixture decreases, the reaction is called this.

Endothermic

600

In the 1860s Swiss chemist Johann Friedrich Miescher discovered this molecule.

DNA

600
Most of the mass of an atom is located here.
nucleus
600

The branch of chemistry that studies the composition of matter.

Analytical chemistry?

600

Atoms of the same element always have the same number of protons. However, sometimes different atoms of the same element can have a different number of neturons. These different varieties are called this.

Isotopes

600

In a chemical reaction, if the reactants are heated, it causes the molecules to do this.

Move Faster

800
People thought you could turn iron and lead into what?
gold
800
These particles have a positive charge and are found inside the nucleus.
proton
800

Branch of chemistry studying chemicals that do not contain carbon.

Inorganic Chemistry

800
Carbon's atomic number is _______.
6
800

Some chemical reactions require a substance called a catalyst. The main purpose of a catalyst is to do this.

Speed up the reaction.

1000
Names for elements comes from the English or __________ name.
latin
1000
These particles are negatively charge and are found outside the nucleus.
electrons
1000

Branch of chemistry that studies the mechanism, the rate and energy transfer that takes place when matter undergoes a change.

Physical chemistry

1000

Why does hydrogen have an atomic number of 1?

Because it only has one proton

1000

A chemical change is different than a physical change in this way.

A new substance is produced.