Introduction to Formulas Lesson

What is a chemical bond?

• A type of atom

• A force that holds atoms together

• A subatomic particle

• A chemical reaction

What does a subscript in a chemical formula indicate?

• The type of chemical bond

• The number of molecules

• The number of atoms of an element

• The charge of the ion

Which of the following is a polyatomic ion?

• Na+

• Cl-

• H2O

How can you identify an element as a metal, nonmetal, or metalloid?

• By its color

• By its position in the periodic table

• By its atomic number

• By its density

What is the main difference between ionic and covalent compounds?

• Ionic compounds are gases, covalent are solids

• Ionic compounds conduct electricity, covalent do not

• Ionic compounds have high melting points, covalent have low

• Ionic compounds are formed by sharing electrons, covalent by transferring

What does evaluating the relationship between the formula of a compound and the structure of its atoms involve?

• Counting the atoms

• Understanding the arrangement of atoms

• Measuring the mass of the compound

• Identifying the color of the compound

Tags

NGSS.MS-PS1-1

What is used to determine the number of each atom in a compound?

• Coefficients

• Superscripts

• Subscripts

• Prefixes

What does the first element of a compound help determine?

• The color of the compound

• Whether the compound is ionic or covalent

• The melting point of the compound

• The density of the compound

Tags

NGSS.MS-PS1-1

Where are nonmetal elements located on the periodic table?

• To the left of the stair-step line

• To the right of the stair-step line

• Along the stair-step line

• Below the stair-step line

Which element is an exception to the location of nonmetals on the periodic table?

• Calcium (Ca)

• Hydrogen (H)

• Zinc (Zn)

• Silver (Ag)