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1. Intro to General Chemistry

Classification of Matter

General Chemistry

1. Intro to General Chemistry

Classification of Matter

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Multiple Choice

Atoms __________ .

A

are submicroscopic particles that make up matter

B

are often found in molecules

C

determine the properties of matter

D

All of the above are true.

E

None of the above is true.

Verified step by step guidance

1

Understand the definition of an atom: Atoms are the basic units of matter and the defining structure of elements. They consist of a nucleus made of protons and neutrons, surrounded by electrons.

Recognize that atoms are submicroscopic: Atoms are incredibly small, typically around 100 picometers in size, making them submicroscopic and not visible to the naked eye.

Identify that atoms are often found in molecules: Molecules are formed when two or more atoms bond together chemically. For example, a water molecule (H₂O) consists of two hydrogen atoms and one oxygen atom.

Determine how atoms influence the properties of matter: The arrangement and type of atoms in a substance determine its chemical properties, such as reactivity, phase, and color.

Conclude that all the statements provided are true: Each statement about atoms is accurate, confirming that atoms are submicroscopic, found in molecules, and determine the properties of matter.

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Related Practice

Multiple Choice

Which of the following statements is true?

Multiple Choice

Choose the homogeneous mixture from the list below.

Classify each of the following as an element, compound or mixture.

a) Ammonia, NH3

b) Gold bar

c) Orange juice

d) Wine

e) Saline solution

Multiple Choice

Consider the following data obtained by decomposing samples of carbon dioxide, CO₂, into its component elements.

Mass of CO₂ and Components
Sample	Mass CO₂	Mass C	Mass O₂
1	44.00 g	12.00 g	32.00 g
2	22.00 g	6.00 g	16.00 g
3	88.00 g	24.00 g	64.00 g

Which of the following statements is consistent with this data?

Multiple Choice

Which of the following is an example of a pure substance?

Multiple Choice

Choose the homogeneous mixture from the list below.

A _____ is a physical combination of matter in any proportions.

Textbook Question

Which of the following statements is a hypothesis about the synthesis of gold nanoparticles? (LO 1.1) (a) Adding a salt solution to gold nanoparticles causes the color to change from red to blue.(b) To examine the effect of salt on gold nanoparticles, variable concentrations of salt are added to the nanopar-ticles and the results are measured(c) A solution of gold nanoparticles with an average diam-eter of 30 nm has a wavelength of maximum absorption of 450 nm and is a reddish-orange color.(d) Adding a substance with a negative charge to the surface of the nanoparticles creates repulsive forces that stabilize small particle size

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