Video Quiz over periodicity

Who developed the Periodic Table?

• Mendeleev, who was a chemist and teacher

• Pavlov, who was a teacher and physchologist

• Ladahoff, who was a teacher and biologist

Valence electrons are: 

• Electrons farthest away from the nucleus
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

When an atom loses a valence electron, it becomes a(n) _____________ ion.

• positive
• negative
• neutral
• polyatomic

Negative ions form when atoms _________ valence electrons.

• lose
• gain
• share

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass
• protons, electrons, and atomic number
• neutrons and electrons
• neutrons and atomic mass

Which of the following is the atomic number of an alkali metal?

• 31
• 20
• 18
• 19

What group on the Periodic Table contains the elements of the alkaline earth family?

• 1
• 2
• 17
• 18

Which element is not in the Alkali metal family?

• Li
• H
• Fr
• Cs