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Questions and Answers
What is the smallest unit of matter that contains a nucleus with positively charged particles?
What is the smallest unit of matter that contains a nucleus with positively charged particles?
- Neutron
- Proton (correct)
- Atom
- Electron
What determines the atomic number of an atom?
What determines the atomic number of an atom?
- Number of electrons
- Number of neutrons
- Number of protons (correct)
- Sum of protons and neutrons
What is the sum of the mass of protons and neutrons in an atom called?
What is the sum of the mass of protons and neutrons in an atom called?
- Mass number
- Atomic weight
- Atomic mass (correct)
- Molar mass
Which particle moves around the nucleus of an atom?
Which particle moves around the nucleus of an atom?
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Study Notes
Atomic Structure
- The smallest unit of matter that contains a nucleus with positively charged particles is an atom.
Atomic Number
- The atomic number of an atom is determined by the number of protons present in the nucleus.
Mass of Atom
- The sum of the mass of protons and neutrons in an atom is called the mass number.
Electron Movement
- Electrons move around the nucleus of an atom.
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