Molecules Flashcard Review

Front

Which statement is true? Options: All atoms are composed of molecules, but not all molecules are composed of atoms., All compounds are molecules, but not all molecules are compounds., All molecules are compounds, but not all compounds are molecules.

Back

All compounds are molecules, but not all molecules are compounds.

Front

A chemical formula is like a recipe for a chemical substance. What is true about a chemical formula?

Back

It identifies which elements are in the chemical substance using chemical symbols.

Front

What is an example of a chemical formula? Options: Trail Mix, Air, NH4, Option 4

Back

NH4

Front

Explain what happens to the elements’ chemical properties when a compound forms.

Back

The chemical properties change to something new.

Front

Chemical compounds are different from mixtures because...

Back

a compound is a pure substance

Front

In a chemical formula, what tells the number of atoms of each element that is present in the compound? Options: the yield, the coefficient, the subscript

Back

the subscript

Front

In a chemical formula, what tells the number of molecules participating in the reaction? Options: the yield, the coefficient, the subscript

Back

the coefficient

Front

Bonds between atoms in a molecule form as a result of: the deletion of electrons in the molecules, the addition of protons in the atoms, the sharing or exchanging of valence electrons

Back

the sharing or exchanging of valence electrons

Front

Which model represents the chemical formula H2O2?

Back

Option 2

Front

What is the properly written chemical formula for this model? Options: H2O, 2HO, O2H

Back

H2O