Atoms
Which subatomic particle is positive?
proton
Which element has 5 protons? Use a Periodic Table.
Boron
T/F: The periodic table is organized by the atomic mass of each element.
False
Which 2 subatomic particles are located in the nucleus?
neutrons
Which subatomic particle is negative?
electron
Which element has 4 neutrons, but only 3 protons? Use Periodic Table
Lithium
it's number of protons (atomic number)
T/F: The atomic theory (models) have changed over time as new discoveries were made.
TRUE
When an atom is positively or negatively charged because it gained or lost electrons, it is called _____.
ion
Which subatomic particle is neutral?
neutron
If a neutral atom has 10 protons, how many electrons does it have?
10
Which elements are found to the left of the staircase on the Table?
metals
What is the most modern atomic model called?
Sulfur is classified as a __________ on the Periodic Table.
nonmetal
When an atom has the same # of protons as electrons, it has a charge of __________.
0 (zero)
What is the abbreviation called for each element?
chemical symbol
Which elements have a completely filled valence energy level (shell) of 8 electrons?
Noble gases (or Group 18)
What are the electrons that are farthest from the nucleus known as?
valence electrons
Periods tell us how many ___________ an element has.
Energy levels (electron shells)
protons
Find F on the PT, how many neutrons does it have?
10
Which element is found on Period 3, group 15?
P - Phosphorus
Which model showed electrons orbiting in perfect circles around the nucleus? (like planets)
Bohr's Model
Elements are located in _________ which have similar properties (characteristics).
Groups (or families)