A
What subatomic particle has a negative charge?
Electron
What particles are in the nucleus?
Protons and neutrons
What subatomic particle has a positive charge?
Proton
How many electrons are in the first shell?
Two
What subatomic particle has no charge?
Neutron
What is the atomic symbol for sodium?
Na
Electrons follow orbits around the nucleus called _________ __________.
Electron shells
What is the scientific formula for salt?
NaCl
Which molecule is a compound?
Cl, H2, CO2, O2
Atoms join together to form _____________.
Molecules
Molecules with atoms from different elements are called _______________.
Compounds
What element has atomic number 8?
Oxygen
What are the horizontal rows on the periodic table of elements called?
Periods
What are the two important categories of elements?
Metals and Non-Metals
2/3 of the elements on the periodic table of elements are _______________
Metals
What is a pure substance with the same number of protons called?
Element
What are the vertical columns on the periodic table of elements called?
Groups
How many protons does Helium have?
2
Elements in the same vertical group have similar ______________.
Properties
How many known elements are there?
118
How many horizontal rows / periods are on the periodic table of elements?
How many vertical columns / groups are on the periodic table of elements?
What element has atomic number 3?
Lithium
What is the scientific formula for water?
H2O
What are the four properties of metals?
Shiny, Ductile, Malleable & Conductive
Draw a Lithium atom and label the protons, neutrons & electrons.
On the board
Protons have a positive charge
Neutrons have no charge
Electrons have a negative charge
What is the difference between a molecule and a compound?
Draw a water molecule and label the atoms using their atomic symbols.
On the board
Name one element that has similar chemical properties as copper.
Silver, Gold or Roentgenium