Periodic table and Bohr Model

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

• groups

• towers

• periods

• atomic numbers

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

The atoms we study are defaulted as neutral, which means they have the same number of

• protons and electrons

• protons and neutrons

• electrons and neutrons

What is the atomic number of this element?

• 4
• 80
• 79
• 8

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

What period is Lead (Pb) in?

• 6

• 4

• Metals

• 4A

What group or family is lead in?

• 6

• 4

• Metal

• 4A

What category is silicon (Si) a part of?

• Metal

• Nonmetal

• Metalloid

• Halogens

What Element is in period 4, group 5A?

• Antimony

• Arsenic

• Tin

• Germanium