Who is the scientist who created the modern periodic table

• Darwin

• Mendeleev

• Newton

• Watson

What type of substance is identified in the periodic table

• Chemical

• compound

• mixture

• element

What does number 12.011 mean

• Group number

• Atomic symbol

• Atomic mass

• Atomic number

What does the atomic number mean

• Number of protons

• Number of electrons

• Number of neutrons

• Number of neutrons and protons

Which one is a noble gas

• Chlorine

• Neon

• SIlver

• Magnesium

What group number are the Halogens

• 1

• 0

• 7

• 3

Which one is a alkali metal

• Sodium

• Fluorine

• Helium

• Magnesium

What is the atomic symbol for Chlorine

• C

• Cn

• Cl

• Cs

What's the atomic number of Sodium

• Na

• 11

• 22.990

• 1

Which one is a metal

• Carbon

• Magnesium

• Oxygen

• Bromine