Unit 2 Review

An ________ is a pure substance made of only one type of atom represented by a chemical symbol

• compound

• element

• metal

• periodic table

A ________ is a pure substance made of two or more elements represented by a chemical formula.

• compound

• element

• metal

• periodic table

Which of the following is an element

• Water

• Air

• Steel

• Oxygen

Which element is most abundant in Earth's crust?

• Aluminum

• Iron

• Oxygen

• Silicon

Tags

NGSS.MS-PS1-1

Which of the following tables correctly identifies the elements and compounds?

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Tags

NGSS.MS-PS1-1

Which one of the following correctly identifies the models?

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Tags

NGSS.MS-PS1-1

Carbon is considered an element, while carbon dioxide is considered a compound. This is

because carbon dioxide is -

• a gas at room temperature.

• made of two different elements.

• given off by green plants.

• useful to human beings.

Tags

NGSS.MS-PS1-1

Students gather information in order to differentiate between elements and compounds.

The students know an element is a substance composed of the same atom, and compounds

are composed of two or more different types of atoms. Based on the data, which of the

following is a compound?

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Tags

NGSS.MS-PS1-1

Which table contains correctly identified elements?

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A student tested the properties of an unknown element. The results of the test are shown in

the table below. Based on the information, which element did the student likely test?

• Cl

• Fe

• Ne

• H