Chapter 1-EL1 + EL2 Elements Flashcards
Atomic structure
Where is most of the mass of an atom concentrated?
The nucleus
What is the diameter of the atomic nucleus compared to the atom as a whole?
Small
What is the relative charge of a proton?
-1
What is the relative size of a proton?
1
What is the relative size of a electron?
1/2000
What is the symbol for mass number?
A
What is the relative charge for an electron?
-1
What is the relative charge of a neutron?
0
What is the relative size of a nuetron?
1
What is the symbol for atomic number?
Z
What is the mass number of an element?
The number of protons plus neutrons inside of an atoms nucleus
What is the atomic number on an element?
The number of protons in an atom
Which number is the atomic number in the periodic table?
The bottom one
Which number is the mass number in the periodic table?
The top one
What is an Isotope?
Atoms of the same element containing different mass numbers, different number of neutrons