History of Chemistry
This kind of change means a different composition.
chemical change
The inner part of an atom that contains the proton and the neutron is called the __________.
Nucleus
The atomic mass of Osmium
190.23
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
Long ago, alchemists tried to turn thing into this.
gold
These particles have a positive charge and are found inside the nucleus.
proton
Atomic masses are measured in what?
AMU
The smallest pieces of matter are called __________.
atoms
Carbon's atomic number is _______.
6
Chemistry is the study of ____.
matter
These particles are located within the nucleus, and have no charge.
Neutron
A proton has the atomic mass of what?
1
Light is a form of this.
energy
What element has a number of 56?
barium
Mendeleev
These particles are negatively charge and are found outside the nucleus.
electrons
The atomic mass of Bismuth
208.98
The law that says matter cannot be created or destroyed
Conservation of Matter (Mass)
Why does hydrogen have an atomic number of 1?
because it only has one proton
The element that was discovered by boiling urine.
Phosphorous
Changing the number of neutrons in an atom creates these.
isotopes
An electron has a mass of what?
1/1836
This kind of change is just a change in shape
physical
Name of element 46
paladium