Covalent Molecule Test

A __________________________ is the force that holds two atoms together and makes them function as a unit.

• bond

• electron

• reaction

• molecule

Emma and Liam are building a model of a molecule. They want the atoms to form bonds to become most __________________________ and to obtain an __________________________.

• stable; octet

• unstable; octet

• stable; duplet

• unstable; duplet

In a group project, Samuel and Nora decide to work together by sharing their resources. This is similar to covalent bonding where electrons are __________________________ between two or more elements.

• shared

• transferred

• donated

• removed

In a chemistry class, Mason and Priya are learning about how the bonding results from mutual attraction of the two nuclei for the __________________________ electrons.

• bonding

• valence

• core

• lone pair

Lily and Daniel are discussing how they will share their lunch. Covalent bonding is like their agreement to share their sandwiches, while ionic bonding would be like Lily giving her apple to Daniel in exchange for his juice.

• Covalent bonding involves sharing electrons while ionic bonding involves electron transfer.

• Covalent bonding involves electron transfer while ionic bonding involves sharing electrons.

• Both types of bonding involve sharing electrons.

• Both types of bonding involve the transfer of electrons.

Hannah is organizing a science fair and needs to label the fifth booth with the correct covalent prefix for the number 5. What prefix should she use?

• penta

• hexa

• hepta

• octa

Nora is organizing a chemistry-themed birthday party and wants to label each table with a covalent prefix. What prefix should she use for table number 9?

• nona-

• octa-

• deca-

• hepta-

Grace is learning about chemical formulas. The first element in the formula is named first, and the full element name is used. The second element is named as though it were an anion (ending gets ________________).

• ate

• ide

• ite

Michael is building a model of a molecule for his science project. He needs to use small numbers to denote the numbers of atoms present in each molecule (AKA represents the __________________________).

• subscripts

• superscripts

• coefficients

• indices

Noah is conducting an experiment in his chemistry class. He needs to write down the chemical formula for Dinitrogen Pentoxide in his lab report. What should he write in the blank space: _______?

• N2O5

• N2O3

• NO2

• N3O5