Quiz on Arrangement of Electrons and Molecules

What is the maximum number of electrons that the 1st electron shell can hold?

• 2

• 4

• 18

• 8

How many electrons can the 2nd and 3rd electron shells hold each?

• 10

• 8

• 6

• 2

What is the electronic configuration of a sodium atom?

• 2, 8, 1

• 2, 8, 2

• 2, 5

• 2, 6

What are the electrons in the outermost shell called?

• Valence electrons

• Core electrons

• Inner electrons

• Nuclear electrons

How many groups are there in the Periodic Table?

• 7

• 12

• 10

• 18

What do elements in the same group of the Periodic Table have in common?

• Same atomic mass

• Same number of valence electrons

• Same number of protons

• Same number of electron shells

What is the chemical formula for a water molecule?

• HO2

• H2O

• H2O2

• OH

What type of molecule is formed when atoms of the same element combine?

• Molecule of an element

• Molecule of a compound

• Ionic compound

• Covalent compound

What does the subscript in a chemical formula indicate?

• Charge of the molecule

• Number of atoms

• Mass of the molecule

• Type of atom

Which of the following represents a nitrogen molecule?

• H2

• N2

• NH3

• O2