Chapter 5 DR
What kind of substance is composed of two or more elements that are chemically combined?
A compound
What is a substance in which all of the building block particles are identical called?
A pure substance
Which of the following can form compounds from nitrogen in the air?
All plants
A solid solution of metals or Nonmetals dissolved in metal is called what?
Alloy
Which of the following compounds is broken down to make aluminum?
Aluminum oxide
A pure substance that cannot be broken down into simpler substances by physical or chemical means is called what?
An element
Which of the following are the building block particles for elements?
Atoms
What do plants use during photosynthesis to make carbohydrates?
Carbon dioxide
When you open a soft drink, carbon acid breaks down into what and water?
Carbon dioxide
The compound that helps give some drinks fizz is called what?
Carbonic acid
What is used to separate the parts of blood?
Centrifuge
Which solid is less soluble at higher temperatures than at lor temperatures?
Cerium sulfate
Traits that identify elements in a category...
Characteristic properties
The only way to break down compounds is through what?
Chemical change
Which of the following is the process by which substances change into new substances?
Chemicl reaction
Wat has a melting point of 1,495*C?
Cobalt
Two or more materials that combine chemically form a what?
Compound
What is a measure of the amount of solute dissolved in a given amount of solvent called?
Concentration
What is used to separate crude oil?
Distillation
Which of the following statements about compounds is true?
Each compound has its own physical properties
What can be identified by its unique properties?
Element
All what are either metals, metallics, or nonmetals?
Elements
What is used to separate sulfur and table salt?
Filter
What is a characteristic chemical property of elements?
Flammability
Why does a helium filled balloon float up when you let go?
Helium is less dense than air
Which of the following elements combine to form the compound citric acid?
Hydrogen, carbon, and oxygen
In a mixture the what of the substances don't change?
Identity
How do elements join to form compounds?
In a specific mass ratio
What is one way of expressing concentration?
In grams of solute per milliliter of solvent
What combines with oxygen to form rust?
Iron
What is used to separate a mixture of aluminum and iron?
Magnet
Elements with properties of both metals and nonmetals are called what?
Metalloids
Silicon, boron, and antimony are examples of what?
Metalloids
Elements that are malleable...
Metals
Elements that are shiny and conducts heat and electric current are what?
Metals
Lead, copper and tin are examples of what?
Metals
A combination of substances that's are not chemically combined are called what?
Mixture
What type of compound do plants and animals use to make proteins?
Nitrogen compounds
Elements that are dull...
Nonmetals
Elements that are poor conductors of heat are what?
Nonmetals
Iodine, sulfur, and neon are examples of what?
Nonmetals
A solution contains many small what?
Particles
Mxtures can be separated through what kind of changes
Physical
Which of the following affects the color of granite?
Ratio of minerals
Which of the following is not a physical property of an element?
Reactivity
Another name for Metalloid ...
Semimetals
Which solids solubility is least affected by temperature changes?
Sodium chloride
The ability of one substance to dissolve in another at a given temperature and pressure is called what?
Solubility
Salt is what in water because it dissolves in water?
Soluble
When substances separate and spread evenly throughout a mixture what is this process called?
Solute
The particles in a what are so small that they don't scatter light?
Solution
In a solutio, what is the substance in which something dissolves called?
Solvent
In a solution of two gasses, the substance that is present in the largest amount is called the what?
Solvent
In a solution the what is usually affects the solubility?
Temperature
Why are we able to eat sodium and chlorine in a compound?
The compound is harmless
How does a concentrated solution differ from a dilute solution if both solutions have the same volume?
The concentrated has more solute
Wich of the following is not true of solutions?
They look like two substances
which of the following substances is a compound?
Water
