Adult Education Science
Fall 2010
Teacher Stacy Graham
Compounds and Mixtures
1 What are the three main types of matter?
- Matter is classified into the three groups based on what?
- A ______________ is made up of two or more different kinds of matter that are physically combined.
- A sample of matter is made up of three different atoms that are chemically combined. What type of matter is this? How do you know?
- A substance is made up of two atoms of oxygen. Is it an element or a compound. Explain why.
- What is a compound?
- What are the properties of sodium, chlorine, sodium chloride?
- How can compounds be broken down into the elements that make it up?
- When an unknown solid is heated, two different gases and a liquid are formed. Is the solid a compound or an element? How do you know?
- How is a molecule different from an element?
- A _______________ is the force of attraction that holds atoms together.
- Why do different kinds of matter in a mixture keep their own properties?
- The substances in a mixture always keep their own________________.
- The substances in a mixture can be ___________ by using the physical properties of the substances.
- Will freezing a mixture of salt and water separate the two substances. Explain.
- A teaspoon of instant coffee is placed in a cup of boiling water. Is this a mixture or a compound? Explain
- How are mixtures and compounds different?
- When certain poisonous gas is combined with a chemically active metal, a fine white powdery substance results. The new substance is neither poisonous nor chemically active. Is the powder a mixture or a compound? How do you know.
- Water is a compound. Salt water is a mixture. List the differences between water and salt water.
- What are valence electrons?
- Why are atoms neutral?
- Does a negative ion have more protons or more electrons?
- How does an ionic bond form?
- What is a crystal?
- Electrons have a _________________ electrical charge.
- When an atom looses electrons, it becomes a ____________ ion.
- An ___________ forms when one atom takes an electron from another atom.
- A ______________ is a solid that contains atoms arranged in a regular pattern.
- How can atoms complete their outermost energy levels?
- Is water an ionic compound or a covalent compound?
- What do electron dot diagrams show?
- In a covalent compound, the atoms joint together to form a ____________.
- In most atoms, the ____________ energy level is not completely filled.
- In a covalent bond, electrons are _____________.
- What is a structural formula?
- In a __________ bond, two pairs of electrons are shared between atoms.
Adult Education Science
Fall 2010
Teacher Stacy Graham
Solutions
- What is a solution?
- What are the different types of solutions?
- What is the difference between a solute and a solvent?
- How can a substance be both soluble and insoluble?
- Why is a water molecule called a polar molecule?
- What happens to sugar molecules when sugar is placed in water?
- What will happen if the force of attraction holding solute particles together is greater than the force of attraction between solute and solvent?
- How are molecular solutions similar to ionic solutions? How are they different?
- What is the relationship between the temperature of a liquid solvent and the rate at which a solid dissolves in it?
- Why do you think more gas can dissolve when pressure is increased?
- What type of compounds will water dissolve?
- What is the difference between a dilute solution and a concentrated solution?
- If you were preparing a solution, how could you tell when it became saturated?
- What happens to a solution that enables it to hold more solute than it normally would?
- Is a can of frozen juice a concentrated or a dilute solution? Explain.
- What will happen to the freezing point of water as you add solute to the water?
- What is boiling point elevation?
- What two important functions does an engine coolant have?
- What two processes are involved in distillation?
- An atom of hydrogen contains one electron in its one energy level. Could a hydrogen atom form a triple bond with another atom?