Podcast
Questions and Answers
What is the formula to calculate the number of neutrons in an atom?
What is the formula to calculate the number of neutrons in an atom?
- Number of neutrons = Mass number (A) - Atomic number (Z) (correct)
- Number of neutrons = Atomic number (Z) + Mass number (A)
- Number of neutrons = Atomic number (Z) × Mass number (A)
- Number of neutrons = Mass number (A) × Atomic number (Z)
What is the definition of isotopes?
What is the definition of isotopes?
- Atoms that have the same atomic number but different mass numbers (correct)
- Atoms that have the same number of neutrons and electrons
- Atoms that have the same number of protons and electrons
- Atoms that have the same mass number but different atomic numbers
What is the charge of an anion?
What is the charge of an anion?
- Neutral
- Positive
- Negative (correct)
- It can be either positive or negative
What holds ions together in an ionic bond?
What holds ions together in an ionic bond?
What is the name of the ion that is a neutral atom that loses electrons and has a positive charge?
What is the name of the ion that is a neutral atom that loses electrons and has a positive charge?
What is the main characteristic of a heterogeneous mixture?
What is the main characteristic of a heterogeneous mixture?
What is an example of a physical property of matter?
What is an example of a physical property of matter?
What is the term for a change in which a substance changes its physical appearance but not its composition?
What is the term for a change in which a substance changes its physical appearance but not its composition?
What is an example of a chemical change?
What is an example of a chemical change?
Which of the following properties of matter depends on the size or amount of the sample?
Which of the following properties of matter depends on the size or amount of the sample?
What is the term for a mixture that is uniform throughout?
What is the term for a mixture that is uniform throughout?
What is the result of a chemical reaction?
What is the result of a chemical reaction?
What is the purpose of the arrow in a chemical equation?
What is the purpose of the arrow in a chemical equation?
How are the physical states of substances represented in a chemical equation?
How are the physical states of substances represented in a chemical equation?
What is the correct order of balancing a chemical equation?
What is the correct order of balancing a chemical equation?
What is the characteristic taste of acids?
What is the characteristic taste of acids?
What is the correct balanced equation for the reaction of hydrogen gas with oxygen gas?
What is the correct balanced equation for the reaction of hydrogen gas with oxygen gas?
What is the purpose of applying a solution of FeCl3 to a bleeding wound?
What is the purpose of applying a solution of FeCl3 to a bleeding wound?
Why does the sky appear blue?
Why does the sky appear blue?
What is a characteristic of gases?
What is a characteristic of gases?
What is the unit of pressure in the SI system?
What is the unit of pressure in the SI system?
What is the function of a barometer?
What is the function of a barometer?
What is the result of settling mud particles in a mixture of water and mud?
What is the result of settling mud particles in a mixture of water and mud?
What is the pressure of a column of mercury exactly 760 mm high at 0°C at sea level?
What is the pressure of a column of mercury exactly 760 mm high at 0°C at sea level?
What are the four variables that define the physical properties of any gas?
What are the four variables that define the physical properties of any gas?
What is the relationship between the pressure and volume of a fixed amount of gas at a constant temperature, according to Boyle's Law?
What is the relationship between the pressure and volume of a fixed amount of gas at a constant temperature, according to Boyle's Law?
What is the relationship between the volume of a fixed amount of gas and its absolute temperature, according to Charles's Law?
What is the relationship between the volume of a fixed amount of gas and its absolute temperature, according to Charles's Law?
What is the purpose of the equation T(Kelvin) = 273 + T(Celsius)?
What is the purpose of the equation T(Kelvin) = 273 + T(Celsius)?
What is the relationship between the volume of a gas and the number of moles of the gas, according to Avogadro's Law?
What is the relationship between the volume of a gas and the number of moles of the gas, according to Avogadro's Law?
