10/26/23 Test Flashcards
What is an element’s atomic mass?
the weighted average mass of all naturally occurring isotopes of an element
Where are electrons found?
in orbitals
Do electrons have a mass?
no
What is the number of protons also known as?
the atom’s atomic number
What is the number of protons plus the number of neutrons?
the mass number
What is the difference between the atomic mass and the mass number?
the atomic mass is the weighted average of all naturally occurring isotopes in an atom and the mass number is the number of protons and neutrons
What are ions?
charged atoms
What are isotopes?
sets of atoms with the same number of protons but a different number of neutrons
What is electron configuration?
the way electrons arrange themselves around a nucleus
What does electron configuration tell us?
the number of protons in an atom
What are sub atomic particles?
protons, neutrons and electrons
What kind of charge do protons have?
a positive charge
What kind of charge do neutrons have?
a neutral charge
What kind of charge do electrons have?
a negative charge
The atomic number is also the number of electrons in what kind of atom?
a neutral atom
What does the ladder method tell us?
electrons can jump energy levels
What happens when an electron is stimulated by light, heat or electricity?
it absorbs energy and moves to a higher level
What makes an electron excited?
when it is absorbed by energy
How is the bright light spectrum determined?
When an excited electron returns to its ground state and releases energy
What does the atomic number tell you?
How many protons are in its atoms
