Exploring Chemical Bonds: Hydrogen and Noble Gases

What do we call a substance made of only one kind of atom?

• Compound

• Molecule

• Element

• Mixture

What is the simplest kind of atom?

• Helium

• Hydrogen

• Carbon

• Oxygen

Why doesn't the electron in a hydrogen atom fly off into space?

• Because of the repulsion between the electron and proton

• Because of the attraction between the electron and proton

• Because of magnetic force

• Because of gravitational force

What happens when two hydrogen atoms come together?

• They bounce off each other

• They stick together to form a molecule

• They repel each other

• They form a compound

What is the role of electrons in the bonding of hydrogen atoms?

• They act as glue to hold the atoms together

• They remain stationary

• They repel the protons

• They cause the atoms to bounce off each other

What is a covalent bond?

• A bond formed by the sharing of electrons

• A bond formed by the attraction of protons

• A bond formed by the transfer of electrons

• A bond formed by the repulsion of electrons

How is a hydrogen molecule represented in a structural formula?

• H-H

• H2O

• H2

• H

What does the subscript '2' in H2 represent?

• The number of protons

• The number of electrons

• The number of hydrogen atoms

• The number of molecules

Why can't helium atoms bond with each other?

• Because they are too small

• Because they have no protons

• Because their electron shells are full

• Because they are too heavy

What does it mean when we say helium is monatomic?

• It has an incomplete electron shell

• It forms multiple bonds

• It is always found as a single atom

• It can bond with other atoms