General, Organic and
Biological Chemistry
Chapter 1 & 2 with
correct answers 2025
What type of radiation can only travel a few centimeters in the air? - correct answersAlpha
A ZERO is not a significant figure if ------> - correct answers- if its at the beginning of a decimal
number
- A placeholder in a large number without a decimal point
What happens during alpha decay? - correct answersThe mass number of the isotope produced
decreases by four and the atomic number decreases by two.
Mass number -4
Atomic number -2
, What are isotopes - correct answersThey are atoms with identical atomic numbers but with
different mass numbers. ( atoms with the same number of protons but different number of
neurons.)
Elements - correct answersPure substances that consist of only one type of an atom.
Gamma Decay - correct answersWill not change the mass number or the atomic number of the
product.
Physical Change - correct answersDoes not change the composition or identity of a substance
Example: Change of state, temp changes, dissolving
Mass - correct answersThe amount of material (matter) in a substance.
What does the nucleus of an atom contain? - correct answersProtons and neutrons
AMU mean ---> - correct answersAtomic Mass Unit
Which state of matter has the lowest kinetic energy? - correct answersSolids
What does a chemical formula tell you? - correct answersThe type and number of elements that
make up that compound
Can an element be separated into different substances? - correct answersNo
What are the first three forms of radiation and what charge is each? - correct answersAlpha-
Positively Charged
Beta- Negatively Charged
Gamma- No charge/ neutral `
Biological Chemistry
Chapter 1 & 2 with
correct answers 2025
What type of radiation can only travel a few centimeters in the air? - correct answersAlpha
A ZERO is not a significant figure if ------> - correct answers- if its at the beginning of a decimal
number
- A placeholder in a large number without a decimal point
What happens during alpha decay? - correct answersThe mass number of the isotope produced
decreases by four and the atomic number decreases by two.
Mass number -4
Atomic number -2
, What are isotopes - correct answersThey are atoms with identical atomic numbers but with
different mass numbers. ( atoms with the same number of protons but different number of
neurons.)
Elements - correct answersPure substances that consist of only one type of an atom.
Gamma Decay - correct answersWill not change the mass number or the atomic number of the
product.
Physical Change - correct answersDoes not change the composition or identity of a substance
Example: Change of state, temp changes, dissolving
Mass - correct answersThe amount of material (matter) in a substance.
What does the nucleus of an atom contain? - correct answersProtons and neutrons
AMU mean ---> - correct answersAtomic Mass Unit
Which state of matter has the lowest kinetic energy? - correct answersSolids
What does a chemical formula tell you? - correct answersThe type and number of elements that
make up that compound
Can an element be separated into different substances? - correct answersNo
What are the first three forms of radiation and what charge is each? - correct answersAlpha-
Positively Charged
Beta- Negatively Charged
Gamma- No charge/ neutral `
