03 Atomic Structure Flashcards
1
Q
What is the atomic number of an element ?
A
Number of protons contained in the nucleus
2
Q
What is the mass number of an element ?
A
The total number of nucleons (protons + neutrons) in the nucleus
3
Q
What are isotopes ?
A
Atoms of the same element with the same number of protons but different number of neutrons
4
Q
What is the first IE ?
A
The amount of energy required to remove one mole of electrons from one mole of gaseous atoms, producing one mole of gaseous ions with a single positive charge
