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Atomic Theory
Question | Answer |
---|---|
atomic theory | scientific explanation of the structure of atoms and how they interact with other atoms. |
What are the building blocks of all matter called? | Atoms |
In current atomic theory, what are atoms mostly? | Empty space |
What is the center of an atom called? | Nucleus |
What is a nucleus? | Small, dense core of an atom |
What is a nucleus surrounded by? | electrons |
Atom | Smallest Unit of an element that maintains the properties of that element. |
Proton | a positively charged particle found in the nucleus of an atom |
Neutrons | particles found in the nucleus, has NO charge |
Electrons | negatively charged particles that speed through an area around the nucleus called the electron cloud |
element | type of matter mad of just one kind of atom |
elements | can not be broken into simpler substances. |
the atoms of an element | All Have the same number of protons |
Number of protons | the number of protons is unique to a specific element. No other element will have the exact same number of protons. |
Why can electrons be gained or lost? | Electrons are far from the nucleus |
Can atoms of the same element have different number of neutrons | Yes, but the protons remain the same. |
Give examples of elements | neon, mercury, chlorine, silver, copper |
Molecule | Made up of two or more atoms joined together chemically |
Compound | a substance formed by atoms from two or more elements. |
Properties of a compound | often different from the properties of the elements that form it. |