Mass number and atomic number Flashcards
1
Q
What is the mass number?
A
Number of protons and neutrons present in the nucleus of the atom
2
Q
What else can the mass number be called?
A
Nucleon number
3
Q
What is the atomic number?
A
Number of protons present in the nucleus of the atom
4
Q
What else can the atomic number be called?
A
Proton number
5
Q
What are the number of protons always equal to?
A
Number of electrons
6
Q
How can you find the number of electrons in a negative ion (anion)?
A
Add the charge to the atomic number
7
Q
How do you find the number of electrons in a positive ion (cation)?
A
Subtract the charge from the atomic number
8
Q
What does the term isoelectronic mean?
A
Atoms and ions that have the same number of electrons
