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CHEM 090 Lecture 4
Atoms
Question | Answer |
---|---|
What is an atom? | The fundamental building blocks of matter |
Atoms are made up of? | Protons, Neutrons and Electrons |
Neurons and protons makes up? | The neucleus |
What is the atomic number? | Number of protons |
What is the atomic mass? | Number of protons + number of electrons |
What charge do protons have? | Positive |
What charge do electrons have? | Negative |
What charge do neutrons have? | Neutral |
Why are Neutrons neutral? | Positive protons are the same as negative electrons so neutrons are neutral to cancel each other and give the atom a neutral charge |
The way electrons are placed into shells of an atom are called | Electronic configuration |
The most outer shell in an atom is called. | Valence shell |
What are isotopes? | Atoms of the same element with the same number of protons and electrons but different number of neutrons |