Biology - The Chemical Basis of Life
anything that occupies space and has mass - CORRECT ANSWER-matter
a pure substance that cannot be broken down - CORRECT ANSWER-element
elements that make up 0.01% of your body's mass, but they are still important to
your health - CORRECT ANSWER-trace element
a substance containing two or more elements that are chemically combined in a
fixed ratio - CORRECT ANSWER-compound
positive charge (+1) - CORRECT ANSWER-proton
negative charge (-1) - CORRECT ANSWER-electron
no charge (0) - CORRECT ANSWER-neutron
smallest possible particle of an element - CORRECT ANSWER-atom
central core of an atom; made up of protons and electrons - CORRECT
ANSWER-nucleus
all atoms have the same number of protons and electrons - CORRECT
ANSWER-atomic number
have the same number of protons in their atoms but different number of neutrons
- CORRECT ANSWER-isotope
one in which the nucleus breaks down over time, giving off radiation in the form
of matter and energy; unstable - CORRECT ANSWER-radioactive isotope
occurs when atom transfers an electron to another atom - CORRECT
ANSWER-ionic bond
anything that occupies space and has mass - CORRECT ANSWER-matter
a pure substance that cannot be broken down - CORRECT ANSWER-element
elements that make up 0.01% of your body's mass, but they are still important to
your health - CORRECT ANSWER-trace element
a substance containing two or more elements that are chemically combined in a
fixed ratio - CORRECT ANSWER-compound
positive charge (+1) - CORRECT ANSWER-proton
negative charge (-1) - CORRECT ANSWER-electron
no charge (0) - CORRECT ANSWER-neutron
smallest possible particle of an element - CORRECT ANSWER-atom
central core of an atom; made up of protons and electrons - CORRECT
ANSWER-nucleus
all atoms have the same number of protons and electrons - CORRECT
ANSWER-atomic number
have the same number of protons in their atoms but different number of neutrons
- CORRECT ANSWER-isotope
one in which the nucleus breaks down over time, giving off radiation in the form
of matter and energy; unstable - CORRECT ANSWER-radioactive isotope
occurs when atom transfers an electron to another atom - CORRECT
ANSWER-ionic bond
