Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
What is the term for the smallest particle that represents an element?
a. atom b. entity c. iota d. unit e. none of the above |
a. atom
|
|
|
What is the term for the number that identifies a particular element?
a. atomic number b. element number c. mass number d. substance number e. none of the above |
a. atomic number
|
|
|
What is the term for matter having a definite composition, but variable properties from sample to sample; for example, alloys and solutions?
a. compound b. element c. heterogeneous mixture d. homogeneous mixture e. none of the above |
d. homogeneous mixture
|
|
|
Which of the following laws states that mass cannot be created or destroyed?
a. law of conservation of energy b. law of conservation of mass c. law of conservation of mass and energy d. law of definite composition e. none of the above |
b. law of conservation of mass
|
|
|
What is the term for an element that is generally shiny, has a high density and high melting point, and is a good conductor of heat and electricity?
a. metal b. nonmetal c. semimetal d. all of the above e. none of the above |
a. metal
|
|
|
What is the term for a particle composed of two or more nonmetal atoms?
a. entity b. iota c. molecule d. unit e. none of the above |
c. molecule
Liquids are typically molecules. |
|
|
What is the term for a direct change of state from a solid to a gas?
a. condensation b. deposition c. sublimation d. vaporization e. none of the above |
c. sublimation
|
|
|
What is the term for a change of state from a gas to a liquid?
a. condensing b. freezing c. melting d. vaporizing e. none of the above |
a. condensing
|
|
|
Air contains nitrogen, oxygen, argon, and other gases. Which of the following describes air?
a. compound b. element c. heterogeneous mixture d. homogeneous mixture e. none of the above |
d. homogeneous mixture
Technically it is hetero if you take into account various pollutants. But it is a homogenous mixture. |
|
|
Which of the following chemical elements corresponds to the symbol C?
a. cadmium b. chromium c. cobalt d. copper e. none of the above |
e. none of the above
"C" stands for Carbon |
|
|
Which of the following chemical elements corresponds to the symbol Na?
a. arsenic b. potassium c. sodium d. strontium e. none of the above |
c. sodium
|
|
|
Which of the following chemical symbols corresponds to titanium?
a. Sn b. Ta c. Ti d. Tm e. none of the above |
c. Ti
|
|
|
Which of the following is a general characteristic of a metal?
a. solid state b. malleable c. conductor of heat d. high density e. all of the above |
e. all of the above
|
|
|
Which of the following elements is an example of a semimetal?
a. H b. C c. Fe d. Sb e. Sn |
d. Sb
Antimony is located within the semi-metals group period 5 groupd 15A |
|
|
Refer to a periodic table and predict which of the following elements is a gas at 25 °C and one atmosphere pressure.
a. Na b. Nb c. Nd d. Ne e. Np |
d. Ne
Ne is already located within the Noble Gas row. |
|
|
Refer to a periodic table and predict which of the following is a liquid nonmetal at 25 °C and one atmosphere pressure.
a. As b. Br c. Cl d. Hg e. Xe |
b. Br
|
|
|
Ammonium sulfate, (NH4)2SO4, is in fertilizer and replenishes nitrogen to the soil. What is the total number of atoms in the chemical formula?
a. 13 b. 14 c. 15 d. 20 e. none of the above |
c. 15
Doesn't make sense answer should be 22 but answer key says different. |
|
|
Which of the following properties of kerosene is a chemical property?
a. soluble in gasoline b. flammable with oxygen c. colorless liquid d. boiling point, 174 °C e. density, 0.730 g/mL |
b. flammable with oxygen
|
|
|
Which of the following is an example of a physical change?
a. adding vinegar to baking soda and producing carbon dioxide b. grinding sucrose crystals and producing powdered sugar c. smoking tobacco and producing smoke and ash d. digesting starch and producing glucose sugar e. none of the above |
b. grinding sucrose crystals and producing powdered sugar
|
|
|
If 0.230 g of sodium metal reacts with 0.355 g of chlorine gas, what is the mass of sodium chloride produced?
a. 0.125 g b. 0.230 g c. 0.355 g d. 0.585 g e. impossible to predict from the given information |
d. 0.585 g
Just a fancy way of saying Add them together. Meaning 2 grams of salt plus 2 grams of chlorine = 4 grams |
|
|
Which physical state demonstrates very high kinetic energy?
a. solid state b. liquid state c. gaseous state d. all of the above e. none of the above |
c. gaseous state
|
|
|
Which physical state demonstrates almost no movement of particles?
a. solid state b. liquid state c. gaseous state d. all of the above e. none of the above |
a. solid state
|
|
|
What happens to the velocity of a molecule when a gas is heated?
a. velocity increases b. velocity decreases c. velocity remains constant d. depends on the gas e. none of the above |
a. velocity increases
|
|
|
According to the conservation of mass and energy law, which of the following is true of an atomic fission bomb?
a. the mass of the bomb and the fission products are identical b. the energy of the bomb and the fission products are identical c. a small amount of matter is converted into energy d. there is no net change in energy e. all of the above |
c. a small amount of matter is converted into energy
|
