Unit 4 - Atoms and the PT Review

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

the positively (+) charged subatomic particle

• proton

• neutron

• electron

• matter

a negatively charged subatomic particle that orbits the nucleus of an atom

• proton

• neutron

• electron

• matter

What does the mass number tell you?

• the number of electrons + protons

• The number of neutrons

• the number of protons + neutrons

• The number of protons.

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

The horizontal (side to side) rows in the Periodic Table are called

• groups

• families

• periods

• atomic numbers

The atomic number of this pictured element is

• 28
• 58.6934
• Ni
• Nickel

What are valence electrons?

• Any of an atom's electrons

• Electrons located on the first energy level

• Electrons not attached to any atom

• electrons located on the outer energy level

Which group of the periodic table is composed of unreactive gases with 8 valence electrons?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases