Groups and Periods
What element is group 1, period 1?
Hydrogen (H)
What are the three types of subatomic particles?
Proton, Neutron, electron
This tells you how many protons an element has
Atomic number
These tiny particles orbit the nucleus in energy levels or shells.
Electrons
What element is group 3, period 5?
Yttrium (Y)
Where is almost the entire mass of an atom located?
The nucleus
This tells you the total mass of an element
Atomic Mass
The group of elements on the far right edge of the periodic table are known as what?
The Noble Gases
What happens as you go down the periodic table (increasing periods)?
Elements get heavier
Electrons have what electrical charge?
Negative
What is the Atomic mass of Chlorine?
35.45
What element has 6 protons?
Carbon
What is the group number and period number of Osmium (Os)?
Group 8, Period 6
This particle determines what element an atom is
Proton
What two subatomic particles determine an element's atomic mass?
Protons + Neutrons
An element with an unusual number of neutrons (extra or missing) is known as what?
An isotope