Combined Science Foundation Trilogy Chemistry Flashcards
(26 cards)
What is the atomic number of carbon?
6
True or False: The pH scale ranges from 0 to 14.
True
Fill in the blank: The process of a liquid turning into a gas is called _______.
evaporation
What is the chemical formula for water?
H2O
Which type of bond involves the sharing of electron pairs?
covalent bond
What is the main gas produced during photosynthesis?
oxygen
Multiple Choice: Which of the following is an alkali metal? (A) Iron (B) Sodium (C) Gold
B) Sodium
What is the law that states mass cannot be created or destroyed in a chemical reaction?
Law of Conservation of Mass
True or False: Acids taste bitter.
False
Fill in the blank: The smallest unit of an element is called an _______.
atom
What is the term for a substance that speeds up a chemical reaction without being consumed?
catalyst
What is the primary component of natural gas?
methane
Multiple Choice: Which of the following is a noble gas? (A) Helium (B) Chlorine (C) Oxygen
A) Helium
What is the term for the number of protons in the nucleus of an atom?
atomic number
True or False: Ionic compounds are generally soluble in water.
True
Fill in the blank: The process of a solid turning directly into a gas is called _______.
sublimation
What is the chemical symbol for gold?
Au
What type of reaction involves the exchange of ions between two compounds?
double displacement reaction
Multiple Choice: Which of the following is an example of a physical change? (A) Burning wood (B) Melting ice (C) Rusting iron
B) Melting ice
What is the main component of air?
nitrogen
True or False: All acids contain hydrogen.
True
Fill in the blank: The pH of a neutral solution is _______.
7
What term describes the amount of matter in an object?
mass
What is the process called when a solid forms from a solution during a chemical reaction?
precipitation
