NSC exam vocabulary questions with correct answers
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Course
NSC
Institution
NSC
NSC exam vocabulary questions with correct answers
element - Answer-pure substance on the periodic table
atom - Answer-smallest particle of an element that still has all of the properties of that element
molecule - Answer-two or more atoms chemically bonded together, such as H2O. atoms of ...
nsc exam vocabulary questions with correct answers
valid answer producing the desired results effe
theory answer a broad substained explanation of
fact answer best information we have at present
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NSC exam vocabulary questions with
correct answers
valid - Answer-producing the desired results; effective
theory - Answer-a broad substained explanation of some aspect of the natural world.
Not a guess, or simply a hypothesis
fact - Answer-best information we have at present time. are constantly changing as
discoveries are being made
science - Answer-an organized way of answering questions about the universe. is a
process, not just a collection of facts
element - Answer-pure substance on the periodic table
atom - Answer-smallest particle of an element that still has all of the properties of that
element
molecule - Answer-two or more atoms chemically bonded together, such as H2O. atoms
of the same element bond together sharing or exchanging of electrons molecules form.
atomic number - Answer-the number of protons in an atom
mass number - Answer-the number of protons plus the number of neutrons in an atom
Isotopes - Answer-atoms of the same element that contain different numbers of
neutrons. has extra neutrons.
neutrons - Answer-they are found in the nucleus of an atom. protons and neutrons stick
together in the nucleus. no charge
electrons - Answer-they are extremely light weight and exist in a cloud orbiting the
nucleus. negative charge
protons - Answer-found in the nucleus. have a positive charge
what conclusions about the structure of atoms arose from the rutheford experiment? -
Answer-conclusion- atoms are mostly empty space with small dense central
core=nucleus
how does the scanning tunneling microscope work, and what uses do they have? -
Answer-allow us to see the surface features of some atoms and molecules, metal
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