Periodic Table and Atoms Chem Study Guide

Who invented the Periodic table?

• John Dalton

• J.J Thompson

• Niels Bohr

• Dimitri Mendeleev

What do rows in the periodic table represent?

• Period - tells the energy level

• Period - tells the number of valence electrons

• Groups - tells the energy level

• Groups - tells the number of valence electrons

What do columns in the periodic table represent?

• Period - tells the energy level

• Period - tells the number of valence electrons

• Groups - tells the energy level

• Groups - tells the number of valence electrons

What are the elements in blue?

• Metals

• Metalloids

• Non-Metals

What are the elements in green?

• Metals

• Metalloids

• Non-Metals

What are the elements in purple?

• Metals

• Metalloids

• Non-Metals

If a neutral and stable atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?

How do you calculate mass number?

• Neutrons + Electrons

• Electrons + Protons

• Neutrons + Protons

Isotopes has the same number of protons but a different number of ________

What is the Isotope notation of Carbon-12 with a -2 charge?

(Answer in order)