Atoms, Elements And Compounds Flashcards
What are atoms?
The smallest particle of a chemical element that can exist; all matter is made from atoms.
What can the light miscroscope do?
With a light microscope, you can see animal cells but with not much detail, therefore you can’t see atoms through a light microscope.
What can electron microscope do?
Because light microscopes can’t allow you to look at atoms, the electron microscope was invented to magnify things over 500,000 times, enough to see lots of detail inside cells.
Which type of electron microscope is used to look at atoms?
The transmission electron microscope.
What are the 3 subatomic particles?
Proton- contains a positive electric charge equal in magnitude as the electron.
Neutron- has the same mass as a proton and a neutral charge.
Electron- An electron is negatively charged.
How is the atom structured?
The protons and neutrons are stored in the central nucleus.
The electrons surround the nucleus.
What is an element?
An element is a substance that only contains one type of atom.
Who made the first periodic table?
Dmitri Mendeleev
Which groups are reactive?
Group 1,2 and 7.
What is a compound?
Two or more elements that are different chemically join together.
How is a chemical reaction made?
Reactants either combine or split apart to form the products.
The products are always completely different from the reactants.
