What are the 4 main states of matter
Solid, Liquid, Gas, Plasma
What are the three subatomic particles?
Protons, neutrons, electrons.
Who proposed the first atomic theory?
John Dalton.
What is the first element on the periodic table?
Hydrogen.
Periods are horizontal or vertical?
Horizontal
What is the name of the process when solid turns into a liquid?
Fusion
Which subatomic particle has a negative charge?
Electron.
What particle has no charge?
Neutron.
What is the atomic number of calcium and it's symbol?
20 - Ca
What is the symbol for oxygen?
O
What is the process called when a gas turns into a liquid?
Condensation.
What is the center of an atom called?
Nucleus.
What is the charge of an electron?
Negative.
What do elements in the same family have in common?
Chemical characteristics
How many elements are in the 1st period of the periodic table?
2: Hydrogen and Helium
Dry ice turns directly from solid to gas. What is this process called?
Sublimation.
The atomic number of an element represents the number of what?
Protons, Electrons and position
Atoms in the same period, have the same amount of:
Orbitas
Which element does not have a family
Hydrogen
What does the atomic mass shows you?
How heavy the atom is, neutrons and the atoms variations
Name the 2 types of Vaporization, and their difference:
Evaporation and boiling. Evaporation happens at the surface and at any temperature, while boiling happens throughout the liquid at its boiling point.
What is the charge of a proton
positive
Which scientist discovered the electron?
J.J. Thomson
How many elements exist in the universe?
118
Changes in states occur because of:
Heat