Intro to Chemistry Quiz 2
Which of the following best describes a liquid?
A constant volume but its shape is not defined
Which of the following statements best describes an element?
A material consisting of only one type of atom.
What are metalloids?
Elements that have some properties like metals and some like nonmetals.
The atomic symbol for potassium is _____________.
K
Which of the following would be considered a heterogeneous mixture?
Salad Dressing
Which of these is not a metal?
Se
What is the difference between a compound and a mixture?
The components of a mixture are not chemically bonded together A compound can be physically separated into its components; A mixture can not be physically separated into its components.
Which of the following is a type of kinetic energy?
The energy transfer from higher temperature to lower temperature.
Indicate following properties as chemical or physical.
Water has high boiling point. (physical) water bubbles when boiling. (physical) Sodium chloride can dissolve in water. (physical) Helium dose not usually react with other substances. (chemical) Mixing vinegar and baking soda can generate bubbles (chemical) Alcohol is flammable. (chemical)
What is changed when we heat up an object with stove.
We converted electrical energy to thermal energy.
Which element would have chemical properties the most similar to chlorine (Cl)?
Ar
Which of the following describes a nonmetal?
poor conductor of electricity
The phase in which atoms and molecules no longer move around is ___________.
the solid phase
Which of the following elements is an alkali metal?
lithium (Li)
Which of the following energy is not a type kinetic energy?
Chemical energy
Which of the following is a mixture?
air
Which of the following is a metaloid?
antimony (atomic no. = 51)
A compound is represented by the __________.
chemical formula
What is the process when a gas changes into a liquid?
condensation
Which of these properties describes a metal?
conduct electricity, conducts heat very well
