Principles Of Chemistry - Atomic Structure Flashcards
1
Q
What is a molecule?
A
Formed when atoms join together by chemical bonds.
2
Q
What is the atomic number?
A
The number of protons and electrons in an atom
3
Q
What is the mass number?
A
Number of protons and neutrons in an atom
4
Q
What is an isotope?
A
Different atoms of the same element containing the same number of protons but different numbers of neutrons in the nuclei
5
Q
What is the relative atomic mass of an element?
A
An average value that takes into account the abundance of isotopes of the element.
6
Q
What is the equation for calculating the relative atomic mass?
A
RAM = (mass of isotope A x % of isotope A) + (mass of isotope B x % of isotope B)
100
