History of Chemistry
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
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
If an atom was enlarged so the electrons were spinning around the stands of a football stadium, how big would the nucleus be?
Dime
This is anything that takes up space (has a mass).
matter
Atomic numbers of an atom are the same as the number of what in an atom?
protons
People thought you could turn iron and lead into what?
gold
These particles have a positive charge and are found inside the nucleus.
proton
Carbon's atomic number is _______.
6
The earliest form of chemistry was called _______.
alchemy
These particles are located within the nucleus, and have no charge.
Neutron
Energy cannot be created or destroyed, it is only transferred into another form. What scientific law states this?
Law of Conservation of Energy
What element has a number of 56?
barium
Names for elements comes from the English or __________ name.
latin
These particles are negatively charge and are found outside the nucleus.
electrons
Mass cannot be created or destroyed, only transferred. What scientific law states this?
Law of Conservation of Mass
Why does hydrogen have an atomic number of 1?
because it only has one proton
People first realized that an atom had a proton and an electron in which decade?
1910's
Most of the mass of an atom is located here.
nucleus
E=mc2 states that matter can be converted to what?
Energy
Some atoms have more ___________, which makes it an ion and gives it a negative charge
electrons