A chemical formula is like a recipe for a chemical substance. How is this true?

It provides a list of ingredients and their proportions.

It shows the cooking time required.

It indicates the temperature needed for preparation.

It describes the taste of the substance.

What does the chemical formula signify (represent)? (Oscar 703)

the composition of a compound by using chemical symbols and subscripts to indicate the elements present and their respective numbers of atoms within a molecule

What happens to the elements’ chemical properties when a compound forms?

The elements lose their original chemical properties and form new ones.

The elements retain their original chemical properties.

The elements' chemical properties remain unchanged.

The elements' chemical properties are enhanced.

Compounds are different from mixtures because _____________.

the ingredients of a chemical compound retain their properties

the elements of a compound can be easily separated

Bonds between atoms in a molecule form as a result of ___________.

the sharing or exchanging of valence electrons

the electrical charge between the atoms

the deletion of protons in one of the atoms

the addition of protons in the atoms

What substances are pure substances? (Asher 701)

Elements, compounds, and Mixtures

How do compounds form? (Mahamaya 703)

when two or more elements combine chemically through chemical bonds

Look at the picture. It's a glucose molecule - that's a type of sugar. How many TYPES of atoms do you see?

3 types of atoms: white, black, and red

Molecules Assessment

Authored by MARIELA GUAMAN

Science

7th Grade

NGSS covered

Used 7+ times

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MULTIPLE SELECT QUESTION

45 sec • 2 pts

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: KMnO₄

element

compound

molecule

mixture

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: HCl

Molecule

Element

Compound

Mixture

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: Cl₂

Molecule

Compound

Element

Mixture

MULTIPLE SELECT QUESTION

45 sec • 2 pts

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category). Formula: O₂

Molecule

Compound

Element

Mixture

MULTIPLE SELECT QUESTION

45 sec • 2 pts

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category)
Formula: H₂O

Molecule

Compound

Element

Mixture

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Molecules Assessment

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category). Formula: KMnO₄

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category). Formula: HCl

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category). Formula: Cl₂

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category). Formula: O₂

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category) Formula: H₂O

A chemical formula is like a recipe for a chemical substance. How is this true?

What does the chemical formula signify (represent)?(Oscar 703) (a)

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Discover more resources for Science

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: KMnO₄

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: HCl

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category).
Formula: Cl₂

Identify each formula as element, compound, and/or molecule. (A substance can belong to more than one category)
Formula: H₂O

What does the chemical formula signify (represent)?
(Oscar 703)

(a)