Chem 108 Ch 1-2

Select all the statements that correctly describe elements.

- An element is a substance that can not be broken down into simpler substance. - Elements can be converted into more complex substances through a chemical reaction with other substances. - An element is a type of pure substance.

Select all the statements that correctly describe a homogeneous mixture.

- Any microscopically small portion of a homogeneous mixture would have the same composition as any other portion. - A homogeneous mixture has a uniform composition throughout.

Select all de options that represent general properties of metals.

- Metals conduct heat. - Metals are shiny. - Metals conduct electricity.

Match each physical state of the matter to the correct description.

- Soild——-has a fixed shape, has its own value, has particles that are fixed in place - Liquid—- takes the shape of the filled portion of its container, has its own volume, has particles that are randomly arranged and free to move about. - Gas—- takes the shape and the volume of its container, has particles that are widely separated and more independently of one another - Aqueous— dissolved in water

Select all the statements that correctly describe facts about elements.

- Some elements have been synthesized by scientists. - Elements are building blocks of matter. - Some elements are isolated from natural sources on Earth.

Select all the options that correctly describe volume.

- The Volvo me of a cube is equal to length multiplied by width multiplied by height. - Volume is the amount of space a substance occupies. Volume is a three-dimensional quantity .

Describe the notation used for writing an element symbol. Select all that apply.

- The element symbol consists of one or two letters of the element's name, which can be the English, Latin, or the name in another language. - The first letter of an element symbol is uppercase, and the second letter , if present, is lowercase.

Select all that correctly describe mass and/or weight.

- The interaction of mass with gravity creates weight. - Weight can be measured on a scale or balance.

Match each element name to the correct element symbol.

- Tin :Sn - sulfur: S - sodium: Na - selenium: Se - Silicon: Si

Which of the following options are examples of homogeneous mixtures? Select all that apply.

- a well-mixed sample of sugar water - a red sports drink containing sugar, salt, and food coloring

A(n) —- is the smallest unit of an element that has the chemical properties of that element. Two or more of these units can be bound together in a discrete arrangement to form a(n) —- .

- atom - molecule

Match each term describing mixtures to its definition.

- homogeneous mixture——a mixture with a uniform composition throughout - mixture—- a physical combination of two or more elements or compounds - solution — a type of homogeneous mixture that is typically composed of a substance in lesser amount dissolved in a substance in greater amount - heterogeneous mixture— a mixture that is not uniform throughout

Match each section of the periodic table (shown) to the groups or types of elements found in that section.

- main-group elements ~ Groups 1,2, and 13-18 - transition elements ~ Groups 3-12 - inner-transition elements ~ Lanthanides and Actinides

A sample of matter that consists of a combination of two or more pure substances is called a(n) ———-. This composition may vary in its———-.

- mixture - composition

Match each physical state to the correct symbol.

- solid—-(s) - liquid —-(l) - gas—-(g) -aqueous—-(aq)

Solve for the mass of 85.4 kg in units of pounds. 1 lb= 453.6 g

1.88 x 10^2 lb

Convert 54 F to units of kelvins.

285 K

An example of matter is correctly described by which of the following statements?

A textbook is an example of matter because it occupies space and has mass.

Which of the following options correctly define an element symbol?

An element symbol is a shorthand version of an element's longer name.

Select all the statements that correctly describe a chemical formula.

- A chemical formula that does not contain subscript numbers consists of a one-to-one ratio of elements that are present. - A chemical formula uses subscript numbers to show all the relative proportions of the elements in the compound. - A chemical formula describes the composition of a compound using the symbols for the elements that make up the compound.

Select all the terms that correctly describe a compound.

- A compound is a type of pure substance and has properties different from those of its component elements. - A compound is an element composed of two or more elements combined in definite proportions. - A compound is described by a chemical formula that includes the symbols for the elements that make up the compound.

Select all the statements that correctly describe a pure substance.

- A pure substance cannot be separated into components by physical means. - A pure substance has the same composition throughout.