SRA #5

What makes a compound different from an element?

• A compound has more than one bond between atoms, while an element has only one bond
• A compound can be a solid or a liquid, while an element can only be a gas.
• A compound is made of more than one type of atom, while an element is composed of the same type of atom
• A compound occurs naturally in nature, while an element has to be made in a laboratory.

How are monoatomic elements and diatomic elements different?

• Monoatomic elements include only nonmetals, and diatomic elements include both metals and nonmetals
• Monoatomic elements are dangerous to human health in their natural forms, and diatomic elements are essential to human health in their natural forms
• Monoatomic elements have only one bond in their stable forms, and diatomic elements have two bonds in their stable forms
• Monoatomic elements have only one atom in their stable forms, and diatomic elements have two atoms in their stable forms

Which substance(s) is (are) diatomic?

• 1 only
• 3 only
• 1 and 3
• 2 and 4

Tags

NGSS.MS-PS1-1

The atmosphere is made of several gases including nitrogen (N2), oxygen (O2), argon(Ar), and carbon dioxide (CO2). How can the gases in Earth’s atmosphere be described?

• a mixture of monoatomic and diatomic elements only
• a mixture of diatomic elements and compounds only
• a mixture of monoatomic elements and compounds only
• a mixture of monoatomic and diatomic elements, and compounds

Tags

NGSS.MS-PS1-1

What is wrong with the student’s diagram?

• The three atoms have to be different.
• The three atoms have to be joined together chemically.
• The three atoms have to be the same size.
• The three atoms have to be metals.

Tags

NGSS.MS-PS1-1

Which chemical formula represents a compound?

• H2O2
• Cl2
• Mg
• Ne

Tags

NGSS.MS-PS1-1

A student compares elemental molecules and compound molecules. Which pair of models does the student compare?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

Which molecules can be classified as elemental molecules?

• 1 and 2
• 1 and 3
• 2 and 4
• 3 and 4

Tags

NGSS.MS-PS1-1

Which diagram contains both monatomic elements and diatomic elements?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

How is an elemental molecule different from a compound molecule?

• An elemental molecule contains only one atom of one element, while a compound molecule contains two or more atoms of the same element
• An elemental molecule contains only one atom of one element, while a compound molecule contains atoms of two or more different elements
• An elemental molecule contains two or more atoms of the same element, while a compound molecule contains atoms of two or more different elements
• An elemental molecule contains atoms of two different elements, while a compound molecule

Tags

NGSS.MS-PS1-1