Chap 2.2 - Atomic particles Flashcards
Where is protons and neutrons located
Centre of atom and ( contain mass of atom )
What is the 3 main sub - atomic particles
Proton, neutron, electron
What is a proton number
Number of protons in atom
Is the number of electron same as number of proton
Yes
What is nucleon mass
Number of protons and neutrons in nucleus
How to find the number of neutrons in atoms
Subtracting proton number from the nucleon number
What is isotopes atoms
Atoms of same elements âž¡ same protons and electrons different number of neutrons
What is the characteristics of Isotopes atoms
They have same chemical properties and different physical properties
What is identical chemical properties
Same number of electrons involve in chemical reactions
What is different physical properties
- Different mass ⬅ ( proton + different newton )
- Different melting and boiling points
What is the arrangement of electrons in atoms
Negatively - charged electrons move around nucleus in electron shell âž¡ hold certain number of electrons
how many electron the first shell holds
2
How many electron the second and third shell holds
8
What chemical properties of elements depend on
Number of valence electrons
What is arrangement of electrons in atom represented
Electronic configuration and Eletronic structure
